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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 $1,142 NZD
SGD 868 SGD
As of October 31, 2026
Save $926 NZD (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,067 NZD 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 $1,142 to $2,067, a $926 spread on the same certified stone. Frank Darling lists it at $2,067. 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: $2,067 NZD|Low: $1,142 NZD|High: $2,126 NZD|Avg: $1,603 NZD|-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$1,142 NZD
Retailer 11$1,244 NZD
Retailer 4$1,323 NZD
Retailer 3$1,356 NZD
Retailer 9$1,390 NZD
Retailer 5$1,475 NZD
Retailer 10$1,722 NZD
Retailer 7$1,772 NZD
Retailer 2$1,778 NZD
Retailer 12$1,852 NZD
Retailer 8$1,980 NZD
Frank Darling$2,067 NZD

44 data points across 12 retailers

12 retailers$1,142 NZD to $2,067 NZD

A
Cheapest Retailer
-
$1,142 NZD
SGD 868 SGD
A
Retailer 2
-
$1,244 NZD
$700 USD
View
A
Retailer 3
-
$1,323 NZD
SGD 1,006 SGD
View
A
Retailer 4
-
$1,356 NZD
$763 USD
View
A
Retailer 5
-
$1,390 NZD
$782 USD
View
A
Retailer 6
-
$1,475 NZD
£653 GBP
View
B+
Retailer 7
-
$1,722 NZD
$969 USD
View
B+
Retailer 8
-
$1,772 NZD
£785 GBP
View
B+
Retailer 9
-
$1,778 NZD
€953 EUR
View
B+
Retailer 10
-
$1,852 NZD
$1,042 USD
View
Retailer 11
-
$1,980 NZD
$1,114 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2669868HK · Nov 3
$2,067 NZD
$1,163 USD
View
11 more retailers have this diamond
Prices start from $1,142 NZDSave up to $926 NZD

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
$1,142 NZD