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0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2557966125

Certificate GIA 2557966125

Diamond specifications and retailer prices

From $895 SGD
₹66,642 INR
As of November 2, 2026
Save $2,834 SGD (76%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $3,729 SGD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 2557966125. Listed at 13 retailers as of October 30, 2026, with prices from $895 to $3,729, a $2,834 spread on the same certified stone. NZ Jewellers lists it at $3,729. 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
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2557966125
Dimensions5.58 × 5.55 × 3.49 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Top View
5.58 mm5.55 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557966125
Side View
Table 56.0%Crown 35.5°Girdle: ThinPavilion 41.2°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $3,729 SGD|Low: $794 SGD|High: $3,729 SGD|Avg: $1,524 SGD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 3, 2026
Retailer 6$895 SGD
Retailer 4$931 SGD
Retailer 13$1,201 SGD
Retailer 10$1,202 SGD
Retailer 3$1,307 SGD
Retailer 12$1,360 SGD
Retailer 2$1,384 SGD
Retailer 7$1,539 SGD
Retailer 8$1,548 SGD
Retailer 5$1,694 SGD
Retailer 11$1,776 SGD
Retailer 9$2,178 SGD
NZ Jewellers$3,729 SGD

23 data points across 13 retailers

13 retailers$895 SGD to $3,729 SGD

A
Cheapest Retailer
-
$895 SGD
₹66,642 INR
A
Retailer 2
-
$931 SGD
$728 USD
View
Final sale: no returns
B+
Retailer 3
-
$1,201 SGD
$939 USD
View
B+
Retailer 4
-
$1,202 SGD
$940 USD
View
B+
Retailer 5
-
$1,307 SGD
$1,022 USD
View
B+
Retailer 6
-
$1,360 SGD
$1,063 USD
View
B+
Retailer 7
-
$1,384 SGD
£852 GBP
View
B+
Retailer 8
-
$1,539 SGD
£947 GBP
View
B+
Retailer 9
-
$1,548 SGD
€1,153 EUR
View
Retailer 10
-
$1,694 SGD
A$2,038 AUD
View
Price last confirmed 30 days ago
B
Retailer 11
-
$1,776 SGD
ZAR 22,433 ZAR
View
B
Retailer 12
-
$2,178 SGD
£1,341 GBP
View
Most Expensive
B
NZ Jewellers
32482787-982f-4cf7-b41c-92ed8cc2a066 · Oct 30
$3,729 SGD
$2,916 USD
View
12 more retailers have this diamond
Prices start from $895 SGDSave up to $2,834 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
$895 SGD