Diamond Rarity
wheel / straight color

Fancy Blue

>6,000 examined; direct study lower bound

GIA study figure
6k
Last decade in the 2018 publication
exact lifetime count: not publicly disclosed
Est. graded 2006–2025
11.9k–12.4k
scenario envelope, not a census
Median USD per carat
$218k
n=68 included + 25 qualified · $13.6k–$4.03M · 0.13–31.62 ct · 1992–2026
Rarity-adjusted value
×0.68
parity price $148k/ct ÷ median $218k/ct · n=68
×0.68 · at rarity trend
auction sales by intensity86 sales
  1. Fancy Deep4% of cohort$102k/ct · 1.08 ct · 2001$127k/ct · 3.33 ct · 1997$182k/ct · 2.69 ct · 2002$252k/ct · 4.77 ct · 1999$555k/ct · 13.49 ct · 1995$1.67M/ct · 7.03 ct · 2019$1.77M/ct · 7.74 ct · 2016$1.79M/ct · 5.30 ct · 2013$2.03M/ct · 6.24 ct · 2025
  2. Fancy Vivid6% of cohort$291k/ct · 3.32 ct · 2005$906k/ct · 3.43 ct · 2010$1.04M/ct · 2.97 ct · 2023$1.15M/ct · 2.52 ct · 2021$1.25M/ct · 2.13 ct · 2021$1.44M/ct · 10.95 ct · 2010$1.57M/ct · 3.49 ct · 2023$1.58M/ct · 3.68 ct · 2025$1.61M/ct · 5.04 ct · 2026$1.80M/ct · 13.22 ct · 2014$1.83M/ct · 4.83 ct · 2023$1.84M/ct · 3.51 ct · 2023$2.13M/ct · 8.01 ct · 2016$2.34M/ct · 7.32 ct · 2016$2.91M/ct · 14.54 ct · 2017$3.17M/ct · 10.10 ct · 2016$3.94M/ct · 14.62 ct · 2016$4.03M/ct · 12.03 ct · 2015
  3. Fancy Intense18% of cohort$23.1k/ct · 0.13 ct · 2017$53.2k/ct · 0.58 ct · 2005$71.8k/ct · 1.11 ct · 2003$81.7k/ct · 0.50 ct · 1998$102k/ct · 2.17 ct · 2003$164k/ct · 3.13 ct · 2000$181k/ct · 1.63 ct · 2003$189k/ct · 5.80 ct · 1999$197k/ct · 5.15 ct · 1997$200k/ct · 1.72 ct · 1995$210k/ct · 1.84 ct · 2010$226k/ct · 0.72 ct · 2023$241k/ct · 0.73 ct · 2017$299k/ct · 1.36 ct · 2024$385k/ct · 3.02 ct · 2009$401k/ct · 2.28 ct · 2011$492k/ct · 1.42 ct · 2026$513k/ct · 1.79 ct · 2023$543k/ct · 3.02 ct · 2019$565k/ct · 6.29 ct · 2009$578k/ct · 1.63 ct · 2023$708k/ct · 2.55 ct · 2023$791k/ct · 3.81 ct · 2016$904k/ct · 3.06 ct · 2023$956k/ct · 6.03 ct · 2016$1.06M/ct · 2.21 ct · 2022$1.17M/ct · 2.17 ct · 2019$1.42M/ct · 9.66 ct · 2016
  4. Fancy18% of cohort$13.6k/ct · 0.22 ct · 2023$58.2k/ct · 0.73 ct · 2021$78.8k/ct · 0.90 ct · 2005$82.6k/ct · 1.62 ct · 1995$85.8k/ct · 1.47 ct · 1992$96.2k/ct · 0.78 ct · 2023$113k/ct · 2.26 ct · 1997$113k/ct · 3.33 ct · 1997$127k/ct · 11.25 ct · 1998$132k/ct · 5.18 ct · 1998$151k/ct · 5.00 ct · 1998$155k/ct · 2.00 ct · 2010$170k/ct · 3.52 ct · 1996$173k/ct · 3.78 ct · 1993$186k/ct · 3.20 ct · 1997$206k/ct · 3.59 ct · 1993$209k/ct · 3.23 ct · 2017$224k/ct · 6.21 ct · 2005$261k/ct · 14.18 ct · 2016$265k/ct · 31.62 ct · 2026$327k/ct · 19.20 ct · 1994$359k/ct · 5.70 ct · 2014$368k/ct · 5.38 ct · 1994$472k/ct · 3.50 ct · 2013
  5. Fancy Light11% of cohort$19.2k/ct · 5.07 ct · 2000$22.6k/ct · 1.07 ct · 1990$23.4k/ct · 4.01 ct · 2000$49.7k/ct · 12.62 ct · 1994$83.5k/ct · 0.83 ct · 2022$141k/ct · 7.62 ct · 2011$159k/ct · 11.64 ct · 2025
price by intensity
IntensityIncluded nMedian $/ctMean $/ctLow – highSince 2020QualifiedStudy stonesShare of cohort
Fancy Light4$66.6k$77.9k$19.2k – $159k$121k · n=2$23.4k · n=3—11%
Fancy20$153k$186k$13.6k – $472k$58.2k · n=3$188k · n=4—18%
Fancy Intense19$226k$374k$23.1k – $1.06M$535k · n=6$543k · n=9—18%
Fancy Vivid14$1.82M$2.15M$906k – $4.03M$1.58M · n=6$1.30M · n=4—6%
Fancy Deep7$252k$717k$102k – $2.03M$2.03M · n=1$1.73M · n=2—4%
methodologyshow
read before interpreting

Published count covers a historical study, not lifetime grading. Includes Faint/Very Light/Light; 54% of straight blues are Faint through Fancy Light.

argyle and GIA

No additional Argyle population claim used.

two-color grades on this hue
auction sales68 included · 25 qualified
IDIntensityLot / stoneCaratsClaritySaleRealisedUSD / ctStatusSources
A12Fancy Vivid
Oppenheimer Blue
Exceptional provenance and size; ring with side diamonds.
14.62 ctVVS1
Christie's
Geneva · 18 May 2016
CHF 56,837,000
$57,541,779 · Auction-house USD equivalent
$3.94MIncludedlot · result
A13Fancy Vivid
Pear vivid blue ring
Colored center in diamond surround; house result and grade.
4.83 ctIF
Christie's
Hong Kong · 28 May 2023
HKD 68,925,000
$8,841,313 · Auction-house USD equivalent
$1.83MIncludedlot
A14Fancy Vivid
Cushion vivid blue ring
Jewelry lot price; diamond surround.
3.49 ctIF
Christie's
New York · 6 Dec 2023
USD 5,495,000
$5,495,000 · USD as reported
$1.57MIncludedlot
A15Fancy Intense
Brilliant-cut blue solitaire
Useful smaller-carat intense-blue comparison.
1.63 ctVS1
Phillips
Hong Kong · 5 Oct 2023
HKD 7,366,000
$942,848 · Auction-house USD equivalent
$578kIncludedlot · result
A16Fancy
The Azure Blue
2026 sale; previously auctioned in 2022, which is not separately counted here.
31.62 ctVVS1
Christie's
New York · 9 Jun 2026
USD 8,371,000
$8,371,000 · USD as reported
$265kIncludedlot
A17Fancy Vivid
Marquise vivid blue ring
GIA report recovered from Christie’s New York 9 June 2026 catalog, lot 51, PDF page 39. Natural Fancy Vivid Blue, VVS2; potentially IF is not the current clarity grade. Published sold result retained.
5.04 ctNot captured
Christie's
New York · 9 Jun 2026
USD 8,127,000
$8,127,000 · USD as reported
$1.61MIncludedlot · result
A69Fancy Intense
Fancy Intense Blue diamond ring
Whole-lot price divided by target colored carat weight; mounting, accents and signature are included.
0.72 ctIF
Phillips
Geneva · 6 Nov 2023
CHF 146,050
$162,839 · FRED local units per USD; sale date
$226kIncludedlot · fx
A87Fancy Intense
Fancy Intense Blue diamond ring
Whole-lot price divided by target colored carat weight; mounting, accents and signature are included.
1.36 ctIF
Phillips
Geneva · 11 Nov 2024
CHF 355,600
$406,168 · FRED local units per USD; prior business day
$299kIncludedlot · fx
A129Light
Light Blue Diamond and Diamond Ring
Whole-lot price divided by target colored carat weight; mounting, accents and signature are included.
2.59 ctVS1
Phillips
Hong Kong · 30 Mar 2026
HKD 838,500
$106,997 · FRED local units per USD; sale date
$41.3kIncludedlot · fx
A156Very Light
Very Light Blue Diamond, Coloured Diamond and Diamond Ring
Whole-lot price divided by target colored carat weight; mounting, accents and signature are included.
3.01 ctVS1
Phillips
Hong Kong · 27 Nov 2022
HKD 819,000
$104,780 · FRED local units per USD; prior business day
$34.8kIncludedlot · fx
1–10 of 93
1 / 10
population scenarios 2006–2025
point input6k · window 2008–2017
scenario envelope 2006–202511.9k–12.4k
IN6k
M111.9k
M2A12.2k
M2B12.4k

>6,000 unmodified blue (R06). Uses the reported bound as a point. Includes pale grades; exact count and window are unavailable.

Includes Faint–Light grades and several color mechanisms. No mine operating-life assumption is used. The source bound does not support a finite population ceiling.

supply evidence
this exact grade
IDCohortIntensity binStonesSharePeriod · scopeLimitsSource
S045BlueFaint—19%Roughly decade before 2018 publication
Exact hue; approximate chart share

Unlabelled bar heights. Readings total 99%; no normalization. Caption separately states 54% Faint through Fancy Light. Do not derive counts from this lower-bounded population.

Figure 3, printed p. 116
S054BlueFaint through Fancy Light—54%Roughly decade before 2018
Exact hue; combined intensities

This 54% is not the value for any one intensity.

Figure 3 caption, p. 116
S046BlueVery Light—10%Roughly decade before 2018 publication
Exact hue; approximate chart share

Unlabelled bar heights. Readings total 99%; no normalization. Caption separately states 54% Faint through Fancy Light. Do not derive counts from this lower-bounded population.

Figure 3, printed p. 116
S047BlueLight—13%Roughly decade before 2018 publication
Exact hue; approximate chart share

Unlabelled bar heights. Readings total 99%; no normalization. Caption separately states 54% Faint through Fancy Light. Do not derive counts from this lower-bounded population.

Figure 3, printed p. 116
S048BlueFancy Light—11%Roughly decade before 2018 publication
Exact hue; approximate chart share

Unlabelled bar heights. Readings total 99%; no normalization. Caption separately states 54% Faint through Fancy Light. Do not derive counts from this lower-bounded population.

Figure 3, printed p. 116
S049BlueFancy—18%Roughly decade before 2018 publication
Exact hue; approximate chart share

Unlabelled bar heights. Readings total 99%; no normalization. Caption separately states 54% Faint through Fancy Light. Do not derive counts from this lower-bounded population.

Figure 3, printed p. 116
S050BlueFancy Intense—18%Roughly decade before 2018 publication
Exact hue; approximate chart share

Unlabelled bar heights. Readings total 99%; no normalization. Caption separately states 54% Faint through Fancy Light. Do not derive counts from this lower-bounded population.

Figure 3, printed p. 116
S051BlueFancy Vivid—6%Roughly decade before 2018 publication
Exact hue; approximate chart share

Unlabelled bar heights. Readings total 99%; no normalization. Caption separately states 54% Faint through Fancy Light. Do not derive counts from this lower-bounded population.

Figure 3, printed p. 116
S052BlueFancy Deep—4%Roughly decade before 2018 publication
Exact hue; approximate chart share

Unlabelled bar heights. Readings total 99%; no normalization. Caption separately states 54% Faint through Fancy Light. Do not derive counts from this lower-bounded population.

Figure 3, printed p. 116
S053BlueFancy Dark——Roughly decade before 2018 publication
Exact hue; chart limitation

The all-blue/gray/violet dark bar cannot be assigned to unmodified Blue.

Figure 3, p. 116
evidence
R06
G3
Blue — unmodified>6,000 · 38%Bound / approximation only
>15,000 blue/gray/violet study submissions · Pre-2018 study; described as last decade

Use direct >6,000 statement. Rounded 15,000 × 37.8% does not recover this count.