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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 $1,040 CAD
$744 USD
As of October 31, 2026
Save $673 CAD (39%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,713 CAD 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 $1,040 to $1,713, a $673 spread on the same certified stone. Frank Darling lists it at $1,713. 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
Color
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: $1,713 CAD|Low: $1,040 CAD|High: $1,768 CAD|Avg: $1,355 CAD|-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 2, 2026
Retailer 9$1,040 CAD
Retailer 6$1,094 CAD
Retailer 3$1,133 CAD
Retailer 10$1,157 CAD
Retailer 2$1,260 CAD
Retailer 4$1,307 CAD
Retailer 11$1,309 CAD
Retailer 7$1,491 CAD
Retailer 5$1,516 CAD
Retailer 8$1,678 CAD
Frank Darling$1,713 CAD

30 data points across 11 retailers

11 retailers$1,040 CAD to $1,713 CAD

A
Cheapest Retailer
-
$1,040 CAD
$744 USD
A
Retailer 2
-
$1,094 CAD
SGD 1,058 SGD
View
A
Retailer 3
-
$1,133 CAD
SGD 1,096 SGD
View
A
Retailer 4
-
$1,157 CAD
$828 USD
View
B+
Retailer 5
-
$1,260 CAD
£710 GBP
View
B+
Retailer 6
-
$1,307 CAD
$935 USD
View
B+
Retailer 7
-
$1,309 CAD
$937 USD
View
B+
Retailer 8
-
$1,491 CAD
£840 GBP
View
B+
Retailer 9
-
$1,516 CAD
€1,033 EUR
View
Retailer 10
-
$1,678 CAD
$1,201 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2677081HK · Nov 2
$1,713 CAD
$1,226 USD
View
10 more retailers have this diamond
Prices start from $1,040 CADSave up to $673 CAD

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
$1,040 CAD