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20.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 5234238312

Certificate GIA 5234238312

Diamond specifications and retailer prices

From $1,426,239 NZD
$802,475 USD
As of November 1, 2026
Save $390,734 NZD (22%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $1,816,973 NZD at Yorxs · As of November 1, 2026
View at Yorxs

About this 20.66ct natural round diamond

This 20.66ct natural round sits in the over five carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5234238312. Listed at 4 retailers as of November 1, 2026, with prices from $1,426,239 to $1,816,973, a $390,734 spread on the same certified stone. Yorxs lists it at $1,816,973. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

20.66
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle32.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 5234238312
Dimensions17.54 × 17.39 × 10.99 mm
L/W Ratio1.01
Star length45%
Lower girdle80%
Top View
17.54 mm17.39 mm20.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5234238312
Side View
Table 57.0%Crown 32.5°Girdle: STK-STKPavilion 41.8°Culet: NoneDepth 62.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $1,428,448 NZD|Low: $1,382,456 NZD|High: $1,825,076 NZD|Avg: $1,513,850 NZD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Yorxs
November 1, 2026
Retailer 3$1,399,687 NZD
Retailer 2$1,426,239 NZD
Retailer 1$1,428,448 NZD
Retailer 4$1,487,991 NZD
Yorxs$1,816,973 NZD

29 data points across 5 retailers

4 retailers$1,426,239 NZD to $1,816,973 NZD

Retailer 1
-
$1,399,687 NZD
A$1,211,593 AUD
Price last confirmed 29 days ago
B
Retailer 2
-
$1,426,239 NZD
$802,475 USD
View
B
Retailer 3
-
$1,428,448 NZD
£632,849 GBP
View
Most Expensive
B
Yorxs
4438E07F5 · Nov 1
$1,816,973 NZD
€973,640 EUR
View
3 more retailers have this diamond
Prices start from $1,426,239 NZDSave up to $390,734 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B
20.66ct Round
$1,426,239 NZD