Diamonds are valued by the interplay of four measurable characteristics — cut, color, clarity, and carat weight — but the diamond market is far more nuanced than a simple formula. A 2-carat round brilliant with excellent GIA grades can sell for $10,000 or $60,000 depending on the precise combination of those grades, the fluorescence character, and the setting context. Antique diamonds — old mine cuts, old European cuts, and early transitional cuts — operate in a parallel collector market where warmth, hand-cut facet character, and period originality are prized over ideal light performance.
Fancy color diamonds represent the most volatile and potentially the most lucrative segment. Natural pink diamonds (primarily from the now-closed Argyle mine in Australia) have appreciated dramatically since the mine's closure in 2020; a 1-carat vivid pink can reach $1M+. Natural blue diamonds (boron-colored, such as the Hope Diamond lineage) are rarer still. Natural yellow and cognac diamonds are more accessible ($3,000-$30,000 per carat for vivid grades). Treatment status — whether a fancy color is natural or artificially induced — is the critical distinction, requiring GIA or equivalent laboratory testing.
For diamonds in jewelry settings, the period and maker of the piece add value entirely separate from the stone's gemological characteristics. A 1.5-carat old mine cut diamond in an original Georgian closed-back setting is worth far more than the same stone reset in a modern mounting. Signed pieces by Cartier, Van Cleef & Arpels, and Tiffany carry house premiums of 50-200% over unsigned equivalents. Our AI evaluates the stone characteristics visible in photographs alongside the setting period and any visible maker's marks.
Types of Diamond We Value
Upload a photo of any of the following — our AI identifies type, period, and condition from images.
Price Ranges by Style & Period
Verified hammer prices from Sotheby's, Christie's, Bonhams & Heritage Auctions. Maker attribution and provenance can push individual pieces well above these ranges.
| Style | Period | Typical Range | Key Value Driver |
|---|---|---|---|
| Natural Fancy Vivid Pink | Argyle & non-Argyle, any period | $500,000 - $5M+ per carat | Argyle origin with certificate commands further premium; Argyle mine closed 2020 increasing rarity |
| Natural Fancy Blue | Any period | $100,000 - $4M+ per carat | Boron-colored; GIA natural color confirmation essential; among the rarest colored diamonds |
| Round Brilliant, D-F / IF-VVS2 | Modern cut, 3+ carats | $15,000 - $100,000+ per carat | Triple excellent cut grade; no fluorescence; GIA certified; price scales exponentially with carat weight |
| Natural Fancy Vivid Yellow | Any period | $8,000 - $30,000 per carat | Canary yellow; vivid vs. intense vs. fancy grades make significant difference; GIA or AGSL certification required |
| Old European Cut, 1+ carat | 1890-1930 | $3,000 - $25,000+ | Collector market for antique cuts; warm tone and high crown prized; premium for original period setting |
| Old Mine Cut, 1+ carat | 1830-1900 | $2,000 - $20,000+ | Cushion-like outline; high crown; small table; romantic warm glow; rising demand since 2015 |
| Round Brilliant, G-H / VS | Modern, 1-3 carats | $4,000 - $20,000 | Eye-clean; near colorless; the practical high-value range for most jewelry diamonds |
| Melee & Sub-1 carat | Any period | $200 - $3,000 | Individual stones; value primarily as jewelry components; loose melee has limited secondary market value |
Condition, provenance, and documented maker attribution significantly affect realized prices.
What Affects Diamond Value?
These six factors account for the majority of price variation at auction. Understanding them before you sell — or buy — can make a substantial difference.
For colorless diamonds, D (absolutely colorless) through Z (light yellow/brown). D-F are colorless; G-J near-colorless; K-Z noticeably tinted. D-F commands strong premiums; the difference between D and G can be 30-50% in price for otherwise identical stones. For fancy colors, intensity grade (Faint, Very Light, Light, Fancy, Fancy Intense, Fancy Vivid) is the primary driver — Vivid can be 5-10x Fancy for the same hue.
For round brilliants, GIA cut grades (Excellent, Very Good, Good, Fair, Poor) directly affect light performance and price. Triple Excellent (cut, polish, symmetry all Excellent) commands a significant premium. Hearts and Arrows pattern — a precision variant of triple excellent — is the highest standard. For fancy shapes, GIA does not assign cut grades; proportions and light performance must be evaluated individually.
From Flawless (FL) through Included (I1, I2, I3). FL/IF are extremely rare and command premiums. VVS1/VVS2 have inclusions visible only under 10x magnification. VS1/VS2 are eye-clean under normal viewing — the practical sweet spot. SI1 may be eye-clean depending on inclusion placement. I-clarity stones have visible inclusions that affect durability. For colored diamonds, the clarity standards are somewhat different as inclusions are expected.
Price per carat increases dramatically at key thresholds: 0.50, 0.70, 0.90, 1.00, 1.50, 2.00, 3.00, 5.00 carats. A 0.99-carat diamond is worth materially less per carat than a 1.00-carat equivalent. This price jump at round numbers can be 20-40% for identical quality. For fancy color diamonds, larger stones are exponentially rarer and price per carat escalates sharply.
Fluorescence (the blue glow under UV light) is complex and controversial. For D-F colorless diamonds, strong fluorescence is generally discounted 10-20% as it can cause a milky appearance. For G-J near-colorless stones, faint to medium fluorescence can make the stone appear whiter face-up — sometimes adding value. Strong blue fluorescence in lower color grades (K-M) can mask the yellow tint and command a small premium in some markets.
GIA (Gemological Institute of America) certification is the gold standard; AGSL (now merged with GIA) is also trusted. EGL (European Gemological Laboratory) certificates are considered overgraded by the trade and sell at significant discounts. For fancy color diamonds, natural color confirmation (vs. treated color) is worth thousands to millions per stone. For historical diamonds with notable provenance — royal collections, famous jewelers, auction history — the story can multiply value independently of the stone's 4Cs.
How to Get Your Diamond Valued
Take well-lit photos of front, back, sides, and any maker marks or signatures. Include close-ups of the base, hardware, and any labels. The more detail, the more accurate the valuation.
Upload to our Quick Valuation Tool for an instant price range based on comparable sold items from Sotheby's, Christie's, and 40+ other auction houses.
Verify your result by browsing Diamond auction records filtered by date range, price, and auction house.
Generate a certified appraisal report for insurance, estate planning, or resale — accepted by most insurers and estate attorneys as supporting documentation.
Upload a photo of your diamond and get an instant price range in seconds, backed by 5M+ real auction results.
Notable Makers & Their Values
Attribution to a documented maker can multiply value tenfold or more. These are the most sought-after names at major auction houses and institutions.
Frequently Asked Questions
Ready to Find Out What Your Diamond Is Worth?
Instant AI valuations backed by 5M+ real auction records from the world's top houses.
No credit card required to browse · Cancel anytime