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0.66ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 1559266688

Certificate GIA 1559266688

Diamond specifications and retailer prices

From $666 CAD
SGD 644 SGD
As of October 31, 2026
Save $657 CAD (50%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,323 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 1559266688. Listed at 8 retailers as of October 31, 2026, with prices from $666 to $1,323, a $657 spread on the same certified stone. Frank Darling lists it at $1,323. 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
FluorescenceFaint
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1559266688
Dimensions5.57 × 5.59 × 3.47 mm
L/W Ratio1.00
Culet sizeNone
Top View
5.57 mm5.59 mm0.66 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1559266688
Side View
Table 57.0%Crown 36°Girdle: THN-MEDPavilion 41°Culet: NoneDepth 62.1%

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: $1,323 CAD|Low: $444 CAD|High: $1,323 CAD|Avg: $920 CAD
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 9$444 CAD
Retailer 4$666 CAD
Retailer 10$726 CAD
Retailer 7$830 CAD
Retailer 8$943 CAD
Retailer 2$1,030 CAD
Retailer 3$1,056 CAD
Retailer 5$1,092 CAD
Retailer 6$1,115 CAD
Frank Darling$1,323 CAD

5 data points across 10 retailers

8 retailers$666 CAD to $1,323 CAD

A
Cheapest Retailer
-
$666 CAD
SGD 644 SGD
A
Retailer 2
-
$726 CAD
SGD 702 SGD
View
A
Retailer 3
-
$830 CAD
$594 USD
View
A
Retailer 4
-
$943 CAD
$675 USD
View
A
Retailer 5
-
$1,030 CAD
€702 EUR
View
A
Retailer 6
-
$1,056 CAD
£595 GBP
View
Retailer 7
-
$1,092 CAD
$781 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2640840HK · Nov 2
$1,323 CAD
$947 USD
View
7 more retailers have this diamond
Prices start from $666 CADSave up to $657 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
$666 CAD