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0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 5241025206

Certificate GIA 5241025206

Diamond specifications and retailer prices

From $821 SGD
As of October 31, 2026
Save $666 SGD (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,488 SGD at Frank Darling · As of November 3, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5241025206. Listed at 12 retailers as of October 31, 2026, with prices from $821 to $1,488, a $666 spread on the same certified stone. Frank Darling lists it at $1,488. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 5241025206
Dimensions5.57 × 5.58 × 3.49 mm
L/W Ratio1.00
Culet sizeNone
Top View
5.57 mm5.58 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241025206
Side View
Table 56.0%Crown 34.5°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.5%

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: $1,488 SGD|Low: $821 SGD|High: $1,530 SGD|Avg: $1,154 SGD|-2.8%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 6$821 SGD
Retailer 11$895 SGD
Retailer 4$952 SGD
Retailer 3$976 SGD
Retailer 9$1,000 SGD
Retailer 5$1,061 SGD
Retailer 10$1,239 SGD
Retailer 7$1,275 SGD
Retailer 2$1,280 SGD
Retailer 12$1,333 SGD
Retailer 8$1,424 SGD
Frank Darling$1,488 SGD

44 data points across 12 retailers

12 retailers$821 SGD to $1,488 SGD

A
Cheapest Retailer
-
$821 SGD
A
Retailer 2
-
$895 SGD
$700 USD
View
A
Retailer 3
-
$952 SGD
View
A
Retailer 4
-
$976 SGD
$763 USD
View
A
Retailer 5
-
$1,000 SGD
$782 USD
View
A
Retailer 6
-
$1,061 SGD
£653 GBP
View
B+
Retailer 7
-
$1,239 SGD
$969 USD
View
B+
Retailer 8
-
$1,275 SGD
£785 GBP
View
B+
Retailer 9
-
$1,280 SGD
€953 EUR
View
B+
Retailer 10
-
$1,333 SGD
$1,042 USD
View
Retailer 11
-
$1,424 SGD
$1,114 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2669868HK · Nov 3
$1,488 SGD
$1,163 USD
View
11 more retailers have this diamond
Prices start from $821 SGDSave up to $666 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
$821 SGD