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0.66ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2566134555

Certificate GIA 2566134555

Diamond specifications and retailer prices

From $952 SGD
$744 USD
As of October 31, 2026
Save $616 SGD (39%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,568 SGD 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 $952 to $1,568, a $616 spread on the same certified stone. Frank Darling lists it at $1,568. 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: $1,568 SGD|Low: $952 SGD|High: $1,618 SGD|Avg: $1,239 SGD|-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$952 SGD
Retailer 6$1,001 SGD
Retailer 3$1,037 SGD
Retailer 10$1,059 SGD
Retailer 4$1,144 SGD
Retailer 5$1,196 SGD
Retailer 11$1,198 SGD
Retailer 7$1,364 SGD
Retailer 2$1,389 SGD
Retailer 8$1,536 SGD
Frank Darling$1,568 SGD

30 data points across 11 retailers

11 retailers$952 SGD to $1,568 SGD

A
Cheapest Retailer
-
$952 SGD
$744 USD
A
Retailer 2
-
$1,001 SGD
View
A
Retailer 3
-
$1,037 SGD
View
A
Retailer 4
-
$1,059 SGD
$828 USD
View
B+
Retailer 5
-
$1,144 SGD
£704 GBP
View
B+
Retailer 6
-
$1,196 SGD
$935 USD
View
B+
Retailer 7
-
$1,198 SGD
$937 USD
View
B+
Retailer 8
-
$1,364 SGD
£840 GBP
View
B+
Retailer 9
-
$1,389 SGD
€1,034 EUR
View
Retailer 10
-
$1,536 SGD
$1,201 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2677081HK · Nov 2
$1,568 SGD
$1,226 USD
View
10 more retailers have this diamond
Prices start from $952 SGDSave up to $616 SGD

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
$952 SGD