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Round|Natural|GIA

0.66ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 6501281572

Certificate GIA 6501281572

Diamond specifications and retailer prices

From $525 USD
HK$4,100 HKD
As of November 1, 2026
Save $1,409 USD (73%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,934 USD 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6501281572. Listed at 14 retailers as of October 30, 2026, with prices from $525 to $1,934, a $1,409 spread on the same certified stone. NZ Jewellers lists it at $1,934. 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
FluorescenceStrong
Crown angle35°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6501281572
Dimensions5.58 × 5.56 × 3.46 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
5.58 mm5.56 mm0.66 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6501281572
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.2%

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: Nov 1
Current: $1,934 USD|Low: $525 USD|High: $1,934 USD|Avg: $853 USD
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
Retailer 14
Retailer 15
November 2, 2026
Retailer 4$525 USD
Retailer 11$569 USD
Retailer 10$625 USD
Retailer 12$664 USD
Retailer 15$664 USD
Retailer 6$681 USD
Retailer 3$712 USD
Retailer 14$712 USD
Retailer 2$755 USD
Retailer 5$773 USD
Retailer 8$826 USD
Retailer 13$887 USD
Retailer 7$898 USD
Retailer 9$1,425 USD
NZ Jewellers$1,934 USD

39 data points across 15 retailers

14 retailers$525 USD to $1,934 USD

A
Cheapest Retailer
-
$525 USD
HK$4,100 HKD
A
Retailer 2
-
$569 USD
View
Final sale: no returns
Retailer 3
-
$617 USD
View
Price last confirmed 49 days ago
A
Retailer 4
-
$625 USD
View
A
Retailer 5
-
$647 USD
SGD 874 SGD
View
A
Retailer 6
-
$664 USD
View
A
Retailer 7
-
$664 USD
View
A
Retailer 8
-
$712 USD
View
A
Retailer 9
-
$712 USD
View
A
Retailer 10
-
$755 USD
£594 GBP
View
A
Retailer 11
-
$826 USD
€787 EUR
View
B+
Retailer 12
-
$887 USD
View
B
Retailer 13
-
$1,425 USD
£1,122 GBP
View
Most Expensive
B
NZ Jewellers
108d9daa-d786-4562-9ea8-ae75631ea637 · Oct 30
$1,934 USD
View
13 more retailers have this diamond
Prices start from $525 USDSave up to $1,409 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
$525 USD