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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 $477 USD
SGD 644 SGD
As of October 31, 2026
Save $470 USD (50%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $947 USD 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 $477 to $947, a $470 spread on the same certified stone. Frank Darling lists it at $947. 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: $947 USD|Low: $318 USD|High: $947 USD|Avg: $658 USD
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$318 USD
Retailer 4$477 USD
Retailer 10$519 USD
Retailer 7$594 USD
Retailer 8$675 USD
Retailer 2$737 USD
Retailer 3$756 USD
Retailer 5$781 USD
Retailer 6$798 USD
Frank Darling$947 USD

5 data points across 10 retailers

8 retailers$477 USD to $947 USD

A
Cheapest Retailer
-
$477 USD
SGD 644 SGD
A
Retailer 2
-
$519 USD
SGD 702 SGD
View
A
Retailer 3
-
$594 USD
View
A
Retailer 4
-
$675 USD
View
A
Retailer 5
-
$737 USD
€702 EUR
View
A
Retailer 6
-
$756 USD
£595 GBP
View
Retailer 7
-
$781 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2640840HK · Nov 2
$947 USD
View
7 more retailers have this diamond
Prices start from $477 USDSave up to $470 USD

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
$477 USD