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Aquarius - Amethyst 
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Aries - Diamond 
Taurus - Emerald 
Gemini - Pearl 
Cancer - Ruby 
Leo - Peridot 
Virgo - Blue Sapphire 
Libra - Opal 
Scorpio - Topaz 
Sagittarius - Tanzanite 
Black Diamond
Gemstone Pricing Guide
Black Diamond Prices Per Carat in ZAR, USD, EUR and GBP.
Black diamond price per carat varies significantly depending on whether the stone is natural, treated, or lab-grown, as well as its clarity, polish, and overall face-up appearance.
Black diamonds are one of the most distinctive and controversial gemstones in the global market, valued not for brilliance like white diamonds, but for their bold opaque appearance, rarity type, and fashion appeal.
Black Diamond Pricing Guide: Per Carat in ZAR, USD, EUR & GBP.
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Why Black Diamond Prices Vary
Black diamonds are not priced like traditional gemstones. Instead of brilliance and clarity, pricing depends heavily on origin and treatment type.
Key price drivers include:
- Natural vs treated vs lab-grown origin
- Surface quality and polish
- Degree of opacity and uniformity
- Carat weight and face-up size
- Certification and disclosure
- Cutting quality and durability
The biggest pricing gap comes from whether the black colour is natural or artificially treated.
Black Diamond Price by Gemstone Quality – Per Carat
All prices below are approximate international retail ranges in ZAR, USD, EUR and GBP.
While black diamonds are generally more affordable than high-grade white diamonds, premium natural fancy black diamonds with certification can still command strong international prices.
Black diamonds are a unique category within the diamond family. Unlike white diamonds, which are valued for brilliance and transparency, black diamonds are valued for their opaque appearance, surface quality, and material origin.
Whether you are buying a black diamond engagement ring or a loose gemstone, understanding the price differences between treated, natural, and lab-grown material is essential for making an informed purchase.
| Black Diamond Quality | ZAR | USD | EUR | GBP |
|---|---|---|---|---|
| Lab-Grown Black Diamond | R3,600 – R10,800 | |||
| Treated Natural Black Diamond | R5,400 – R18,000 | |||
| Natural Fancy Black Diamond | R27,000 – R90,000 | |||
| Premium Large Natural Black Diamond | R90,000 – R450,000+ |
How Colour Affects Black Diamond Price
Colour is not graded in the same way as white diamonds, but uniformity and depth still matter.
Appearance Grades
- Greyish / salt-and-pepper black: lower value
- Semi-opaque black: standard market level
- Deep uniform black: higher value
- Strong, consistent jet-black appearance: premium tier
Stones with uneven colouring, grey patches, or visible inclusions tend to be less valuable.
How Clarity Affects Price
Clarity in black diamonds behaves differently from transparent gemstones.
- Surface smoothness = critical value factor
- Chips, pits, or fractures = strong price reduction
- Internal inclusions are often expected
- Uniform surface appearance increases value
Unlike traditional diamonds, clarity here is about surface integrity rather than transparency.
Black Diamond Origins and Price Differences
Black diamonds come from different geological and commercial sources, which heavily influence pricing.
Key Origins:
- Brazil (carbonado-type natural black diamonds)
- Central African Republic (rare natural deposits)
- India (commercial and treated material)
- Global lab-grown production facilities
Natural carbonado black diamonds are significantly rarer and command premium pricing due to their geological rarity.
Black Diamond Size Pricing Effect – per gemstone size
Unlike many gemstones, black diamonds do not always scale linearly with size due to wide quality variation.
| Black Diamond Size | ZAR | USD | EUR | GBP |
|---|---|---|---|---|
| 0.5 - 1 Carat | R3,600 – R18,000 | |||
| 1 - 2 Carats | R5,400 – R36,000 | |||
| 2 - 5 Carats | R10,800 – R90,000 | |||
| 5+ Carats Premium | R90,000 – R450,000+ |
Why Black Diamonds Are Still Valuable
Black diamonds are not rare in the same way as pink or blue diamonds, but they maintain strong value due to market demand and visual uniqueness.
Key Value Factors
-
- Bold Aesthetic Appeal
Black diamonds are chosen for their modern, alternative appearance. - Material Identity
Natural diamond composition still carries intrinsic value. - Jewellery Demand
Highly popular in engagement rings and fashion jewellery. - Large Stone Availability
Larger stones are more accessible than many coloured diamonds. - Strong Contrast in Jewellery
Black diamonds create dramatic contrast when paired with white diamonds or precious metals. - Durable for Everyday Wear
Like all diamonds, black diamonds have excellent hardness and durability for daily jewellery use.
- Bold Aesthetic Appeal
Why Deep Black Stones Cost More
Premium black diamonds command higher prices because:
- Uniform black colour is more visually desirable
• Better surface polish improves appearance
• Clean, consistent stones are harder to source
• Jewellery designers prefer even tone distribution
Stones with a strong, consistent jet-black appearance are the most sought after.
Is Black Diamond a Good Investment?
Black diamonds are generally not considered strong investment gemstones compared to rare coloured diamonds.
They are best suited for:
- Fashion jewellery
- Statement engagement rings
- Alternative gemstone collections
- Budget-conscious diamond buyers
- Modern design-focused jewellery
Natural fancy black diamonds can hold value better than treated or lab-grown stones, but resale liquidity remains limited.
Buying Tips for Black Diamonds
Understand the Type First
Always confirm whether the stone is natural, treated, or lab-grown.
Check Surface Quality
Smooth, polished surfaces are far more valuable than pitted or chipped stones.
Avoid Confusing Appearance Types
Not all black diamonds are uniformly black — many are grey, speckled, or salt-and-pepper in appearance.
Ask for Certification
Natural fancy black diamonds should ideally be accompanied by gemological documentation.
Compare Face-Up Size
Two stones with the same carat weight can look completely different in size and presence.
Be Wary of Overpricing
Treated black diamonds should remain significantly more affordable than natural fancy stones.
Examine Lustre Carefully
Well-polished black diamonds should display a bright metallic or vitreous shine.
Choose the Right Cut Style
Rose cuts and brilliant cuts can create very different visual effects in black diamonds
Buy With Confidence
Professionally inspected gemstones
Full transparency on treatments
Worldwide shipping
Secure checkout
Final Thoughts on BLACK DIAMOND PRICES
Black diamonds offer a bold and distinctive alternative to traditional gemstones, combining diamond durability with a dramatic opaque aesthetic.
While they are generally more affordable than high-grade white diamonds, pricing varies widely depending on whether the stone is lab-grown, treated, or naturally occurring.
Understanding black diamond price per carat, origin differences, and treatment type is essential to avoid overpaying and to select a stone that matches both aesthetic expectations and budget.
For buyers seeking modern, unconventional luxury, black diamonds remain one of the most striking gemstone choices in today’s international jewellery market.
Bold Elegance
Deep Mystery
Rare Power
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Gemstone Price Guides
Understanding gemstone prices can be complex — but knowing what determines value helps you make informed buying decisions. Our professional Gemstone Price Guides explain how rarity, colour, clarity, cut, carat weight, treatments and origin influence the pricing of different gemstones.
Each guide provides detailed pricing information across various quality grades and sizes, helping you understand how gemologists and the international gemstone market assess value. You will also learn how factors such as colour, size, origin and clarity affect both current market prices and long-term desirability.
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Other Professional Gemstone Guides
Before purchasing a gemstone, we also recommend reading our professional Gemstone Buyer’s Guides. These guides explain the quality factors that influence beauty, rarity and value, helping you better understand gemstone grading, treatments, durability and overall investment quality.
Our Gemstone Side-by-Side Comparison Guides make it easier to compare different gemstones in one place. Discover how colour, durability, rarity, value and overall appearance differ between gemstones, helping you choose the perfect stone for your style, budget and preferences.