wheel / two-color grade · dominant Green
Blue-green
Group share
12%
Blue-green group
Exact count
Not disclosed
GIA publishes group shares, not per-grade counts
Median USD per carat
$213k
n=4 included + 2 qualified · $41.7k–$3.16M · 0.42–5.5 ct · 2006–2026
Rarity-adjusted value
insufficient data
two-color grades have no published population
auction sales by intensity6 sales
- Fancy Deep—
- Fancy Vivid$1.59M/ct · 5.50 ct · 2014$3.16M/ct · 5.50 ct · 2026
- Fancy Intense$41.7k/ct · 0.42 ct · 2022$144k/ct · 2.03 ct · 2022$181k/ct · 2.03 ct · 2016$244k/ct · 2.25 ct · 2006
- Fancy—
- Fancy Light—
price by intensity
| Intensity | Included n | Median $/ct | Mean $/ct | Low – high | Since 2020 | Qualified | Study stones | Share of cohort |
|---|---|---|---|---|---|---|---|---|
| Fancy Light | — | — | — | — | — | — | — | — |
| Fancy | — | — | — | — | — | — | — | — |
| Fancy Intense | 3 | $181k | $156k | $41.7k – $244k | $41.7k · n=1 | $144k · n=1 | — | — |
| Fancy Vivid | 1 | $3.16M | $3.16M | — | $3.16M · n=1 | $1.59M · n=1 | — | — |
| Fancy Deep | — | — | — | — | — | — | — | — |
methodologyshow
read before interpreting
Exact blue-green vs bluish-green split not provided.
related grades
auction sales4 included · 2 qualified
| ID | Intensity | Lot / stone | Carats | Clarity | Sale | Realised | USD / ct | Status | Sources |
|---|---|---|---|---|---|---|---|---|---|
| A28 | Fancy Vivid | Ocean Dream — 2026 Latest sale of same stone as A29; substantial repeat-sale effect. | 5.50 ct | SI1 | Christie's Geneva · 13 May 2026 | CHF 13,567,500 $17,366,400 · Auction-house USD equivalent | $3.16M | Included | lot · result |
| A49 | Fancy Intense | Heart blue-green ring Heart center with pavé surround and hoop; date and realised amount verified in original public lot data. | 2.25 ct | Not reported | Christie's Geneva · 17 May 2006 | CHF 669,600 $549,844 · FRED local per USD; sale date | $244k | Included | lot · fx |
| A317 | Fancy Intense | Loose cut-cornered square blue-green diamond Whole-lot result divided by target carats; setting and accent value is not deducted. | 0.42 ct | SI2 | Heritage US / online; location not confirmed · 29 Sept 2022 | USD 17,500 $17,500 · USD as reported | $41.7k | Included | lot |
| A573 | Fancy Intense | A COLORED DIAMOND AND DIAMOND RING Ring includes 0.51 + 0.50 ct D/IF side diamonds. Same target appears at 2022 Christie’s C6367688; distinct transaction. | 2.03 ct | SI2 | Christie's New York · 18 Oct 2016 | USD 367,500 $367,500 · USD as reported | $181k | Included | lot |
| A29 | Fancy Vivid | THE OCEAN DREAM Replaces rounded CHF 7.7m / USD 8.6m with exact original 2014 result CHF 7,781,000 and sale-date FRED conversion. GIA 12617808 and natural color verified in original lot. Same Ocean Dream sold again as A28 in 2026; distinct transaction, repeat gemstone. | 5.50 ct | SI1 | Christie's Geneva · 14 May 2014 | CHF 7,781,000 $8,748,595 · FRED local units per USD; sale date | $1.59M | Qualified | lot · fx |
| A579 | Fancy Intense | COLOURED DIAMOND AND DIAMOND CHOKER Choker with marquise diamonds, weights unreported. Repeat gemstone from C6028901, distinct 2022 sale and setting; full-lot allocation. | 2.03 ct | SI2 | Christie's Geneva · 11 May 2022 | CHF 289,800 $292,520 · FRED local units per USD; sale date | $144k | Qualified | lot · fx |
supply evidence
this exact grade
| ID | Cohort | Intensity bin | Stones | Share | Period · scope | Limits | Source |
|---|---|---|---|---|---|---|---|
| S097 | Blue-green | Individual intensity bins | — | — | Reviewed GIA papers, 2002–2025 Evidence gap for exact grade | An all-intensity hue count or pooled-family distribution does not disclose this exact hue’s distribution. Blank numeric cells mean unavailable, not zero. | See GIA Evidence hue cohorts |
evidence
R28
G4
Blue-green group12%Exact count not stated
Green study color-distribution population · Pre-2018 study; last decade
Exact blue-green vs bluish-green split not provided.
Breeding et al. (2018), Natural-Color Green Diamonds: A Beautiful Conundrum · Hue distribution