What Are Diamonds?

Diamonds are the hardest naturally occurring material on Earth and have fascinated people for thousands of years. Formed deep beneath the Earth's surface under extreme pressure and temperatures over billions of years, every natural diamond is a unique geological masterpiece. Their exceptional brilliance, durability and rarity have made diamonds the ultimate symbol of love, luxury, success and lasting value.

Today, diamonds are most commonly used in fine jewellery, especially engagement rings, wedding rings, earrings, pendants and bespoke luxury pieces. At the same time, investment-grade diamonds have become increasingly popular among investors seeking tangible assets with long-term value.

At Diament Expert, we specialise in both certified natural diamonds and certified lab-grown diamonds, helping customers across Europe and worldwide find the perfect diamond for jewellery or investment.

Natural Diamonds vs Lab-Grown Diamonds

Modern buyers can choose between two types of certified diamonds:

Natural Diamonds

Natural diamonds were created by nature billions of years ago beneath the Earth's crust. Every natural diamond is unique and represents one of the rarest treasures found in nature. Their limited supply contributes to their long-term value and desirability.

Lab-Grown Diamonds

Lab-grown diamonds are created in highly controlled laboratory environments using advanced technology that replicates the natural diamond-growing process. They are chemically, physically and optically identical to natural diamonds and are certified by internationally recognised gemological laboratories.

The only difference between natural and lab-grown diamonds is their origin. Both display the same brilliance, hardness, fire and durability, making them equally suitable for fine jewellery.

Why Certified Diamonds Matter

Whether you choose a natural or lab-grown diamond, certification is essential. A certificate issued by an independent gemological laboratory verifies the authenticity of the diamond and confirms its quality characteristics.

Diament Expert offers diamonds certified by internationally recognised laboratories, including GIA (Gemological Institute of America), IGI (International Gemological Institute) and HRD Antwerp.

Every certificate includes detailed information about the diamond's:

• Carat Weight
• Cut Grade
• Colour Grade
• Clarity Grade
• Measurements
• Fluorescence
• Polish
• Symmetry
• Laser Inscription (where applicable)

Before purchasing, customers can independently verify every certificate directly on the official website of the issuing laboratory. The original PDF report is also available, providing complete transparency and confidence before making a purchase.

Why More Customers Choose Diament Expert

Diament Expert is more than an online jewellery store. We are a European diamond dealer specialising exclusively in certified diamonds. Working directly with leading global suppliers allows us to offer one of Europe's largest selections of certified natural and lab-grown diamonds at highly competitive prices.

Our mission is simple:

• Provide only independently certified diamonds.
• Offer transparent pricing with no hidden costs.
• Help customers choose the perfect diamond through expert guidance.
• Deliver every order securely with fully insured worldwide shipping.
• Maintain the highest standards of trust, transparency and customer service.

Every diamond is carefully reviewed by our specialists before being offered to customers. Combined with our proprietary 9C™ Diamond Evaluation System, this enables buyers to make informed decisions with complete confidence.

How to Choose the Perfect Diamond

Choosing a diamond may seem overwhelming at first. With thousands of certified diamonds available online, understanding which characteristics truly matter can save you thousands while helping you select a stone that looks exceptional.

At Diament Expert, we believe that buying a diamond should be transparent, educational and enjoyable. Instead of focusing only on carat weight, our experts recommend evaluating the complete combination of quality characteristics to achieve the best balance between beauty, value and price.

The most important factors when choosing a certified diamond include:

• Independent certification (GIA, IGI or HRD)
• The internationally recognised 4Cs
• Cut quality and light performance
• Diamond proportions
• Fluorescence
• Budget and intended purpose

Understanding the 4Cs of Diamonds

The international diamond grading system is based on four essential characteristics known as the 4Cs. Developed by the Gemological Institute of America (GIA), this grading system is now used worldwide to evaluate both natural and lab-grown diamonds.

Carat Weight

Carat refers to the weight of a diamond rather than its physical size. One carat equals 0.20 grams.

Larger diamonds are significantly rarer than smaller ones. As carat weight increases, the price generally rises exponentially rather than proportionally.

However, choosing a slightly lower carat weight—for example 0.90 ct instead of 1.00 ct—can often reduce the price considerably while producing almost no visible difference to the naked eye.

Cut

Cut is widely regarded as the most important characteristic affecting a diamond's beauty.

A perfectly cut diamond reflects light internally before returning it through the top of the stone, creating exceptional brilliance, fire and sparkle.

Even a diamond with perfect colour and clarity may appear dull if it has poor proportions or inferior cutting quality.

For round brilliant diamonds, we generally recommend Excellent or Ideal cut grades whenever possible.

Colour

Diamond colour is graded from D to Z.

D-grade diamonds are completely colourless and represent the highest colour grade available.

As the alphabet progresses, diamonds gradually display slightly warmer yellow or brown tones.

In many cases, choosing a G or H colour diamond instead of a D or E colour offers significantly better value while remaining visually colourless once set in jewellery.

Clarity

Clarity measures the number, size and visibility of natural internal characteristics called inclusions and external features known as blemishes.

The internationally recognised clarity scale includes:

• FL — Flawless
• IF — Internally Flawless
• VVS1–VVS2 — Very Very Slightly Included
• VS1–VS2 — Very Slightly Included
• SI1–SI2 — Slightly Included
• I1–I3 — Included

Most inclusions in VS and many SI diamonds cannot be seen without magnification, making these clarity grades an excellent choice for buyers seeking maximum value.

The Fifth C: Certification

Although the traditional grading system focuses on the 4Cs, experienced buyers know that certification is equally important.

An independent laboratory certificate confirms that the diamond has been professionally examined and graded according to internationally accepted standards.

At Diament Expert, every certified diamond includes an original report issued by respected gemological laboratories such as GIA, IGI or HRD Antwerp.

Before purchasing, customers can independently verify every certificate online using the laboratory's official Report Check service, providing complete confidence and transparency.

The Diament Expert 9C™ Diamond System

While the traditional 4Cs remain the global standard, our specialists believe that choosing the perfect diamond requires a more comprehensive evaluation.

For this reason, Diament Expert developed the proprietary 9C™ Diamond Evaluation System, designed to help customers identify exceptional diamonds that offer outstanding beauty and value.

In addition to the traditional 4Cs, our evaluation considers advanced factors such as optical performance, craftsmanship, light return, certificate verification and overall value.

This expert approach allows customers to compare diamonds more accurately and confidently than relying solely on basic grading reports.

Diamond Prices – What Determines the Value of a Diamond?

One of the most common questions buyers ask is: "How much does a diamond cost?" The answer depends on several factors. No two diamonds are exactly alike, which means every stone is valued individually based on its unique characteristics.

The price of a certified diamond is primarily determined by:

• Carat weight
• Cut quality
• Colour grade
• Clarity grade
• Certification
• Rarity
• Market demand

Even small differences in quality can significantly affect the price. Two diamonds of identical size may differ in value by thousands of euros depending on their cut, clarity or colour.

How Much Does a Certified Diamond Cost?

Certified diamonds are available across a wide price range. Smaller diamonds suitable for jewellery can cost only a few hundred euros, while exceptional investment-grade diamonds may be worth tens or even hundreds of thousands of euros.

For example, a certified one-carat diamond can range from approximately €2,500 to well over €20,000 depending on its quality characteristics and certification.

Rather than focusing solely on size, experienced buyers compare the complete combination of quality characteristics to achieve the best overall value.

Why Do Diamond Prices Vary So Much?

Diamond prices fluctuate because every stone is unique.

Factors influencing market value include:

• Global supply and demand
• Mining production
• Diamond rarity
• International wholesale prices
• Certification standards
• Consumer demand

Natural diamonds generally command higher prices because their supply is limited by nature. Lab-grown diamonds offer excellent value while providing the same physical, chemical and optical properties.

Natural Diamonds vs Lab-Grown Diamond Prices

Both natural and lab-grown diamonds are genuine diamonds. The primary difference is how they are created.

Natural diamonds formed billions of years ago beneath the Earth's surface, while lab-grown diamonds are produced using advanced technology that recreates the natural growth process.

Because laboratory production is scalable, lab-grown diamonds are typically more affordable than natural diamonds of comparable quality.

For buyers primarily interested in appearance and brilliance, lab-grown diamonds often represent exceptional value.

For collectors and long-term investors, natural diamonds remain the preferred choice due to their rarity and historical significance.

How to Get the Best Value When Buying a Diamond

The best diamond is not necessarily the most expensive one.

Experienced buyers focus on finding the optimal balance between quality, appearance and budget.

For example:

• Choose Excellent or Ideal Cut whenever possible.
• Consider G–H colour instead of D–F for significantly better value.
• VS or SI1 clarity often appears eye-clean while costing considerably less than Flawless diamonds.
• Select a diamond just below popular weight thresholds such as 0.90 ct instead of 1.00 ct.

These small decisions can reduce the purchase price by thousands while producing virtually no visible difference.

Investment Diamonds

Investment diamonds have become increasingly popular among individuals seeking to diversify their wealth with tangible assets.

Unlike many traditional investments, high-quality natural diamonds combine portability, durability and global recognition. Exceptional diamonds with outstanding colour, clarity and rarity have historically maintained strong demand among collectors and investors.

While no investment can guarantee future returns, certified natural diamonds continue to be regarded as one of the world's most prestigious tangible assets.

Why Buy Directly from a European Diamond Dealer?

Buying directly from a specialised diamond dealer offers several important advantages compared with purchasing from traditional jewellery retailers.

• Access to a significantly larger selection of certified diamonds.
• Competitive pricing through direct relationships with international suppliers.
• Independent certification from GIA, IGI and HRD.
• Professional diamond guidance before purchase.
• Transparent comparison of multiple diamonds.

At Diament Expert, customers gain access to one of Europe's largest databases of certified diamonds, allowing them to compare thousands of natural and lab-grown diamonds before making a decision.

Our specialists help every customer identify the best combination of beauty, quality and value rather than simply recommending the most expensive stone.

Why Choose Diament Expert?

Buying a diamond is more than just selecting a beautiful gemstone—it's a decision built on trust, expertise and transparency. At Diament Expert, we believe every customer deserves complete confidence before making such an important purchase.

We are not simply another online jewellery store. We are a European diamond dealer specialising exclusively in certified natural diamonds and certified lab-grown diamonds, serving customers across Europe and worldwide.

One of Europe's Largest Certified Diamond Databases

Our customers have access to one of Europe's largest selections of certified diamonds. Instead of offering only a limited inventory, we source directly from leading international diamond suppliers, giving you access to thousands of carefully selected diamonds in various shapes, sizes and price ranges.

This allows you to compare multiple certified diamonds before making a decision, ensuring you find the perfect balance between beauty, quality and value.

Every Diamond Is Independently Certified

Every diamond available through Diament Expert is independently certified by internationally recognised gemological laboratories such as:

• GIA (Gemological Institute of America)
• IGI (International Gemological Institute)
• HRD Antwerp

Every certificate verifies the diamond's authenticity and confirms its quality characteristics according to internationally accepted grading standards.

Customers can independently verify every certificate online before purchasing, providing complete transparency and confidence.

The Diament Expert 9C™ Diamond Evaluation System

While most retailers focus exclusively on the traditional 4Cs, Diament Expert goes further.

Our proprietary 9C™ Diamond Evaluation System provides a more comprehensive assessment of every diamond, taking into account not only its basic grading characteristics but also advanced factors such as optical performance, craftsmanship, certificate verification, light return and overall value.

This helps our customers select exceptional diamonds rather than simply expensive ones.

Diamond Concierge Service

Choosing a diamond should never feel overwhelming.

Our Diamond Concierge service offers personalised guidance tailored to your budget, preferences and requirements.

Whether you are buying an engagement ring, an anniversary gift or an investment diamond, our specialists will help you compare multiple options and explain every important detail before you make your decision.

There is never any pressure to buy—only honest, professional advice.

Lowest Price Guarantee

We believe exceptional diamonds should also offer exceptional value.

If you find an identical certified diamond with the same GIA, IGI or HRD certificate number and identical specifications at a lower price from an authorised retailer in your country before purchasing, we will not only match the price—we will beat it by an additional 2%.

Thanks to our direct relationships with leading global diamond suppliers and our efficient online business model, we can often offer prices significantly lower than traditional jewellery retailers.

Safe and Secure Shopping

Your security is our priority.

Our business has successfully completed financial, legal and ownership verification, including KYC and AML compliance procedures.

Customers can choose from a wide range of secure payment methods, including trusted payment providers and encrypted SSL checkout, ensuring every transaction is protected from start to finish.

Worldwide Fully Insured Delivery

Every order is shipped in discreet, unbranded packaging using fully insured delivery services.

Each shipment includes tracking, and every diamond is carefully inspected before dispatch to ensure it arrives in perfect condition.

If anything unexpected happens during transit, Diament Expert assumes full responsibility for resolving the issue quickly and professionally.

A Family Business Built on Trust

Unlike anonymous marketplaces or mass jewellery retailers, Diament Expert is a family-owned business built on long-term relationships with customers.

Our diamond expert, Marta Kłosowska, personally oversees every stage of the buying process—from selecting diamonds from international suppliers and verifying certificates to quality control and customer support.

Every customer receives personal attention from a real diamond expert rather than a call centre or automated support system.

Our Mission

Our mission is simple:

• Provide only independently certified diamonds.
• Offer complete transparency throughout the buying process.
• Help customers make informed decisions with expert guidance.
• Deliver exceptional value through competitive pricing.
• Create a safe, enjoyable and trustworthy diamond buying experience.

Whether you are purchasing your very first diamond or expanding an investment portfolio, our goal remains the same—to help you buy with complete confidence.

Why Customers Trust Diament Expert

• European Diamond Dealer
• Certified Natural & Lab-Grown Diamonds
• One of Europe's Largest Diamond Databases
• Independent GIA, IGI & HRD Certification
• 9C™ Diamond Evaluation System
• Diamond Concierge Service
• Lowest Price Guarantee
• Worldwide Fully Insured Shipping
• Secure SSL Payments
• Family-Owned Business
• Transparent Pricing
• Personal Expert Guidance

Why Choose Diament Expert?

Buying a diamond is more than just selecting a beautiful gemstone—it's a decision built on trust, expertise and transparency. At Diament Expert, we believe every customer deserves complete confidence before making such an important purchase.

We are not simply another online jewellery store. We are a European diamond dealer specialising exclusively in certified natural diamonds and certified lab-grown diamonds, serving customers across Europe and worldwide.

One of Europe's Largest Certified Diamond Databases

Our customers have access to one of Europe's largest selections of certified diamonds. Instead of offering only a limited inventory, we source directly from leading international diamond suppliers, giving you access to thousands of carefully selected diamonds in various shapes, sizes and price ranges.

This allows you to compare multiple certified diamonds before making a decision, ensuring you find the perfect balance between beauty, quality and value.

Every Diamond Is Independently Certified

Every diamond available through Diament Expert is independently certified by internationally recognised gemological laboratories such as:

• GIA (Gemological Institute of America)
• IGI (International Gemological Institute)
• HRD Antwerp

Every certificate verifies the diamond's authenticity and confirms its quality characteristics according to internationally accepted grading standards.

Customers can independently verify every certificate online before purchasing, providing complete transparency and confidence.

The Diament Expert 9C™ Diamond Evaluation System

While most retailers focus exclusively on the traditional 4Cs, Diament Expert goes further.

Our proprietary 9C™ Diamond Evaluation System provides a more comprehensive assessment of every diamond, taking into account not only its basic grading characteristics but also advanced factors such as optical performance, craftsmanship, certificate verification, light return and overall value.

This helps our customers select exceptional diamonds rather than simply expensive ones.

Diamond Concierge Service

Choosing a diamond should never feel overwhelming.

Our Diamond Concierge service offers personalised guidance tailored to your budget, preferences and requirements.

Whether you are buying an engagement ring, an anniversary gift or an investment diamond, our specialists will help you compare multiple options and explain every important detail before you make your decision.

There is never any pressure to buy—only honest, professional advice.

Lowest Price Guarantee

We believe exceptional diamonds should also offer exceptional value.

If you find an identical certified diamond with the same GIA, IGI or HRD certificate number and identical specifications at a lower price from an authorised retailer in your country before purchasing, we will not only match the price—we will beat it by an additional 2%.

Thanks to our direct relationships with leading global diamond suppliers and our efficient online business model, we can often offer prices significantly lower than traditional jewellery retailers.

Safe and Secure Shopping

Your security is our priority.

Our business has successfully completed financial, legal and ownership verification, including KYC and AML compliance procedures.

Customers can choose from a wide range of secure payment methods, including trusted payment providers and encrypted SSL checkout, ensuring every transaction is protected from start to finish.

Worldwide Fully Insured Delivery

Every order is shipped in discreet, unbranded packaging using fully insured delivery services.

Each shipment includes tracking, and every diamond is carefully inspected before dispatch to ensure it arrives in perfect condition.

If anything unexpected happens during transit, Diament Expert assumes full responsibility for resolving the issue quickly and professionally.

A Family Business Built on Trust

Unlike anonymous marketplaces or mass jewellery retailers, Diament Expert is a family-owned business built on long-term relationships with customers.

Our diamond expert, Marta Kłosowska, personally oversees every stage of the buying process—from selecting diamonds from international suppliers and verifying certificates to quality control and customer support.

Every customer receives personal attention from a real diamond expert rather than a call centre or automated support system.

Our Mission

Our mission is simple:

• Provide only independently certified diamonds.
• Offer complete transparency throughout the buying process.
• Help customers make informed decisions with expert guidance.
• Deliver exceptional value through competitive pricing.
• Create a safe, enjoyable and trustworthy diamond buying experience.

Whether you are purchasing your very first diamond or expanding an investment portfolio, our goal remains the same—to help you buy with complete confidence.

Why Customers Trust Diament Expert

• European Diamond Dealer
• Certified Natural & Lab-Grown Diamonds
• One of Europe's Largest Diamond Databases
• Independent GIA, IGI & HRD Certification
• 9C™ Diamond Evaluation System
• Diamond Concierge Service
• Lowest Price Guarantee
• Worldwide Fully Insured Shipping
• Secure SSL Payments
• Family-Owned Business
• Transparent Pricing
• Personal Expert Guidance

Frequently Asked Questions About Buying Diamonds

Are Lab-Grown Diamonds Real Diamonds?

Yes. Lab-grown diamonds are real diamonds. They have the same chemical composition, crystal structure, hardness and optical properties as natural diamonds. The only difference is their origin. Natural diamonds formed underground billions of years ago, while lab-grown diamonds are created using advanced technology under controlled laboratory conditions.

Can I Verify My Diamond Before Buying?

Absolutely. Every certified diamond includes an independent grading report issued by internationally recognised laboratories such as GIA, IGI or HRD. You can verify the certificate directly on the laboratory's official website before completing your purchase.

Do You Ship Worldwide?

Yes. Diament Expert supplies customers throughout Europe and internationally. Every order is carefully inspected, securely packaged and shipped with full insurance and shipment tracking.

Are Your Diamonds Conflict-Free?

Yes. Our suppliers comply with international regulations, including the Kimberley Process, helping ensure that diamonds entering the global market are sourced responsibly.

Can I Buy a Diamond for Investment?

Yes. Many customers purchase certified natural diamonds as part of a long-term wealth preservation strategy. Investment-grade diamonds are typically selected based on rarity, certification, colour, clarity and long-term market demand.

What Is the Best Diamond Shape?

There is no single "best" shape. Round Brilliant diamonds remain the most popular because they maximise brilliance, while Oval, Cushion, Emerald and Princess cuts offer distinctive appearances and excellent value depending on personal preference.

How Long Does Delivery Take?

Delivery times vary depending on the product and destination country. Most orders are prepared within several business days before being shipped using fully insured international delivery services.

Can I Speak With a Diamond Expert?

Yes. Our Diamond Concierge service provides personalised guidance before your purchase. Whether you need help choosing a diamond, comparing certificates or selecting an engagement ring, our experts are happy to assist you.

Why Buy From Diament Expert Instead of a Traditional Jewellery Store?

Unlike traditional jewellery retailers, Diament Expert specialises exclusively in certified diamonds. We offer access to one of Europe's largest diamond databases, transparent pricing, independent certification, expert guidance and competitive prices through direct relationships with global suppliers.

Why Thousands of Customers Choose Diament Expert

Buying a diamond is a once-in-a-lifetime decision for many people. That's why trust, transparency and expertise matter just as much as the diamond itself.

Diament Expert combines the selection of a global diamond marketplace with the personal service of an independent diamond expert. Every customer receives honest advice, complete transparency and access to certified diamonds from the world's leading gemological laboratories.

• Certified Natural Diamonds
• Certified Lab-Grown Diamonds
• One of Europe's Largest Diamond Databases
• Independent GIA, IGI & HRD Certification
• Lowest Price Guarantee
• Diamond Concierge Service
• 9C™ Diamond Evaluation System
• Secure Worldwide Shipping
• Fully Insured Delivery
• Transparent Pricing
• Personal Expert Guidance

Your Trusted European Diamond Dealer

Whether you are purchasing your first diamond, designing a bespoke engagement ring or investing in a rare certified gemstone, Diament Expert is committed to making the entire process simple, secure and transparent.

Our experts carefully select every diamond, verify every certificate and help every customer make a confident buying decision.

From certified natural diamonds to the latest lab-grown diamonds, we provide exceptional quality, competitive prices and personal service trusted by customers across Europe and around the world.

Start Your Diamond Journey Today

Explore one of Europe's largest collections of certified natural and lab-grown diamonds, compare thousands of independently certified stones and receive personalised guidance from our Diamond Concierge team.

Whether you're searching for the perfect engagement diamond, an investment-grade gemstone or a unique gift, Diament Expert is here to help you find the perfect diamond with complete confidence.

Why Buy a Certified Diamond Online?

Buying a diamond online has become the preferred choice for customers around the world. Instead of being limited to a small showroom selection, online buyers gain access to thousands of certified diamonds that can be compared by price, quality and certification before making a decision.

At Diament Expert, transparency is at the heart of everything we do. Every diamond includes an independent laboratory certificate, high-resolution images, detailed specifications and the opportunity to verify its authenticity before purchase.

Shopping online also allows customers to compare multiple diamonds side by side, making it easier to find the perfect balance between beauty, quality and budget.

Combined with expert guidance, secure payment methods and fully insured worldwide delivery, buying a certified diamond online has never been safer or more convenient.

Why Diament Expert Is Different

Thousands of jewellery stores sell diamonds. Diament Expert was created with a different mission—to become a trusted European destination dedicated exclusively to certified diamonds.

Rather than focusing on traditional retail, we combine international sourcing, independent certification and expert guidance to help customers make informed decisions with complete confidence.

Our direct relationships with leading global suppliers allow us to provide one of Europe's largest selections of certified natural and lab-grown diamonds while maintaining highly competitive pricing.

Every customer benefits from personal assistance, transparent pricing and access to independently certified diamonds verified by GIA, IGI or HRD.

Our Commitment to Excellence

• Certified Natural & Lab-Grown Diamonds
• Independent GIA, IGI & HRD Certification
• European Diamond Dealer
• Worldwide Fully Insured Shipping
• Diamond Concierge Service
• 9C™ Diamond Evaluation System
• Lowest Price Guarantee
• Secure SSL Checkout
• Transparent Pricing
• One of Europe's Largest Certified Diamond Databases

Buy Your Diamond With Confidence

Whether you're searching for the perfect engagement diamond, a bespoke jewellery centre stone or an investment-grade natural diamond, Diament Expert provides the expertise, transparency and confidence you deserve.

Browse thousands of certified diamonds, compare GIA, IGI and HRD certificates, receive personalised recommendations from our Diamond Concierge team and discover why customers across Europe and around the world trust Diament Expert.