Why Diamond Matters
Diamond combines gemstone appeal with exceptional physical properties, giving it value in both luxury markets and demanding industrial applications.
RESOURCE PROFILE
Diamond
Diamond is a crystalline form of carbon prized for exceptional hardness, brilliance, durability, and industrial performance. Natural diamonds are best known as gemstones, but diamond also plays an important role in cutting, drilling, grinding, precision manufacturing, electronics, and advanced materials.
Composition
Carbon
Chemical Symbol
C
Category
Gemstone
Hardness
10 Mohs
Common Gem Unit
Carat
Gemstone Uses
Cut and polished diamonds are used in rings, earrings, necklaces, watches, luxury goods, collections, and other fine-jewelry applications.
Industrial Uses
Diamond's hardness makes it valuable for cutting, grinding, drilling, polishing, abrasives, precision tools, and specialized manufacturing.
How Value Is Determined
Gem-quality diamonds are generally evaluated by characteristics such as cut, color, clarity, carat weight, certification, shape, and market demand.
GEMSTONE VALUE
What Determines a Diamond's Value?
Unlike metals that can be quoted by weight using a relatively standardized commodity price, individual diamonds can differ substantially in quality and market value.
01
Cut
Cut affects how light enters, reflects, and exits a polished diamond. Proportion, symmetry, and finish can strongly influence brilliance and visual appeal.
02
Color
Many colorless-to-near-colorless diamonds are graded according to the visibility of body color, while naturally colored diamonds follow different valuation considerations.
03
Clarity
Clarity considers internal inclusions and surface characteristics. Their number, type, size, position, and visibility can influence a stone's grade and value.
04
Carat
Carat measures diamond weight. Larger gem-quality diamonds are generally less common, but size alone does not determine final value.
1 carat
equals 0.2 grams
Two diamonds of identical carat weight can have very different values because quality characteristics, certification, provenance, shape, market conditions, and other factors differ.
IMPORTANT DISTINCTION
Natural and Laboratory-Grown Diamonds
Both can be crystalline diamond, but they originate through very different processes and participate in different parts of the market.
NATURAL
Natural Diamond
Natural diamonds form deep within the Earth under intense pressure and temperature over geological time and may later reach the surface through volcanic processes.
- Geological origin
- Mined from natural deposits
- Gem and industrial markets
- Value influenced by rarity and quality
LABORATORY-GROWN
Laboratory-Grown Diamond
Laboratory-grown diamonds are produced using controlled technological processes that recreate conditions capable of forming crystalline diamond.
- Manufactured origin
- Produced using specialized equipment
- Gem and technical applications
- Separate market dynamics from natural diamonds
RESOURCE USES
What Are Diamonds Used For?
The jewelry market receives the most attention, but diamond's hardness, thermal properties, and durability also support high-value industrial applications.
01
Fine Jewelry
Gem-quality diamonds are cut and polished for engagement rings, wedding jewelry, necklaces, earrings, watches, and other luxury products.
02
Cutting & Drilling
Diamond-tipped tools can cut and drill hard materials used in construction, mining, stonework, manufacturing, and precision engineering.
03
Grinding & Polishing
Diamond abrasives are used where high hardness and precision are required to shape, grind, polish, or finish materials.
04
Advanced Technology
Synthetic diamond materials can be engineered for applications involving thermal management, optics, electronics, research equipment, and specialized industrial systems.
GEOLOGY
How Natural Diamonds Reach the Surface
Natural diamonds typically form deep within the Earth's mantle. They can be transported upward by rapid volcanic eruptions through rock formations such as kimberlite and related volcanic pipes.
Over long periods, erosion may release diamonds from their original host rock and move them into riverbeds, coastal deposits, and other secondary deposits known as alluvial or placer deposits.
01
Deep Mantle Formation
02
Volcanic Transport
03
Kimberlite Deposits
04
Alluvial Deposits
EARTH'S SURFACE
Kimberlite Pipe
Deep Mantle
Natural diamond formation
GLOBAL SUPPLY
Where Natural Diamonds Come From
Natural diamond production is associated with a limited number of major geological regions. Rankings can change with mine output, closures, new projects, and market conditions.
EXTRACTION
How Diamonds Are Mined
Open-Pit Mining
Surface deposits may be developed as large open pits that progressively follow diamond-bearing volcanic rock downward.
Underground Mining
Deep deposits may eventually require underground tunnels, shafts, and specialized extraction methods.
Alluvial Mining
Diamonds weathered from primary deposits may be recovered from river gravels, sediments, and other secondary deposits.
Marine Recovery
In some regions, diamond-bearing sediments can occur offshore and may be recovered using specialized marine equipment.
FROM ROUGH STONE TO JEWELRY
The Diamond Supply Chain
01
Deposit
Diamond-Bearing Geology
→
02
Mining
Ore or Sediment Recovery
→
03
Recovery
Separate Rough Diamonds
→
04
Sorting
Quality & Size Evaluation
→
05
Cut & Polish
Gem Preparation
→
06
Market
Jewelry · Industrial · Collection
RESOURCE VALUE TOOL
Estimate Rough Diamond Deposit Value
Enter processed material, estimated diamond grade, average value per carat, and expected recovery.
Diamond valuation is unusually complex. This tool provides
only a simplified gross contained-value estimate. It does not
account for stone-size distribution, gem quality, color,
clarity, shape, breakage, sorting, mining cost, processing,
certification, royalties, taxes, marketing, or project economics.
Contained Diamonds
—
Gross Contained Value
—
Recoverable Carats
—
Recoverable Reference Value
—
RESOURCE VALUE
Why Are Some Diamonds So Valuable?
Quality
Attractive optical performance, color, clarity, polish, symmetry, and cut quality can substantially influence value.
Size
Large gem-quality stones are less common than small stones, which can increase their value disproportionately.
Rarity
Exceptional natural colors, unusual sizes, provenance, and distinctive quality characteristics can create scarcity within the gemstone market.
Market Confidence
Independent grading, disclosure, traceability, treatment information, and seller reputation can affect how buyers evaluate a diamond.
RELATED RESOURCES
Related Gemstones & Materials
DIAMOND INSIGHTS
Diamond Resource Intelligence
GEMSTONE VALUE
Why Two Diamonds of the Same Size Can Have Different Values
Carat weight is only one part of gemstone valuation. Cut, clarity, color, certification, shape, and demand can change the final market value dramatically.
Read Insight →
GEOLOGY
How Diamonds Travel From the Mantle to the Surface
Natural diamonds form deep within the Earth and can be carried upward through rare volcanic events and diamond-bearing rock formations.
Read Insight →
MARKETS
Natural vs. Laboratory-Grown Diamonds
Both participate in jewelry and technical markets, but their origins, supply systems, pricing dynamics, and buyer expectations differ.
Read Insight →
RESEARCH & METHODOLOGY
Diamond Data & Sources
Earth Value Index diamond coverage is designed to use geological surveys, recognized gemological organizations, government mineral statistics, and other authoritative sources. Current production figures, market values, and country rankings should be date-stamped whenever presented as current information.
EARTH VALUE INDEX
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