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Round|Natural|GIA

0.66ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2566134555

Certificate GIA 2566134555

Diamond specifications and retailer prices

From $1,323 NZD
$744 USD
As of October 31, 2026
Save $856 NZD (39%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,179 NZD at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 0.66ct natural round diamond

This 0.66ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566134555. Listed at 11 retailers as of October 31, 2026, with prices from $1,323 to $2,179, a $856 spread on the same certified stone. Frank Darling lists it at $2,179. 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

0.66
Carat
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2566134555
Dimensions5.67 × 5.71 × 3.42 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.67 mm5.71 mm0.66 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566134555
Side View
Table 59.0%Crown 32.5°Girdle: THN-MEDPavilion 41.4°Culet: NoneDepth 60.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $2,179 NZD|Low: $1,323 NZD|High: $2,248 NZD|Avg: $1,722 NZD|-3.1%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 9$1,323 NZD
Retailer 6$1,391 NZD
Retailer 3$1,441 NZD
Retailer 10$1,472 NZD
Retailer 4$1,590 NZD
Retailer 5$1,662 NZD
Retailer 11$1,665 NZD
Retailer 7$1,896 NZD
Retailer 2$1,930 NZD
Retailer 8$2,134 NZD
Frank Darling$2,179 NZD

30 data points across 11 retailers

11 retailers$1,323 NZD to $2,179 NZD

A
Cheapest Retailer
-
$1,323 NZD
$744 USD
A
Retailer 2
-
$1,391 NZD
SGD 1,058 SGD
View
A
Retailer 3
-
$1,441 NZD
SGD 1,096 SGD
View
A
Retailer 4
-
$1,472 NZD
$828 USD
View
B+
Retailer 5
-
$1,590 NZD
£704 GBP
View
B+
Retailer 6
-
$1,662 NZD
$935 USD
View
B+
Retailer 7
-
$1,665 NZD
$937 USD
View
B+
Retailer 8
-
$1,896 NZD
£840 GBP
View
B+
Retailer 9
-
$1,930 NZD
€1,034 EUR
View
Retailer 10
-
$2,134 NZD
$1,201 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2677081HK · Nov 2
$2,179 NZD
$1,226 USD
View
10 more retailers have this diamond
Prices start from $1,323 NZDSave up to $856 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.

A
0.66ct Round
$1,323 NZD