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Round|Natural|GIA

0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6535595588

Certificate GIA 6535595588

Diamond specifications and retailer prices

From $576 USD
HK$4,500 HKD
As of November 1, 2026
Save $832 USD (59%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,408 USD at MOH London · As of November 1, 2026
View at MOH London

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 6535595588. Listed at 11 retailers as of November 1, 2026, with prices from $576 to $1,408, a $832 spread on the same certified stone. MOH London lists it at $1,408. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6535595588
Dimensions5.53 × 5.57 × 3.48 mm
L/W Ratio1.01
Top View
5.53 mm5.57 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6535595588
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.6%

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: $1,408 USD|Low: $563 USD|High: $1,477 USD|Avg: $1,000 USD|-4.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 5$576 USD
Retailer 10$769 USD
Retailer 8$781 USD
Retailer 7$798 USD
Retailer 9$881 USD
Retailer 3$902 USD
Retailer 2$920 USD
Retailer 4$1,085 USD
Retailer 6$1,149 USD
Retailer 11$1,157 USD
MOH London$1,408 USD

42 data points across 11 retailers

11 retailers$576 USD to $1,408 USD

A
Cheapest Retailer
-
$576 USD
HK$4,500 HKD
A
Retailer 2
-
$769 USD
View
A
Retailer 3
-
$781 USD
View
A
Retailer 4
-
$798 USD
SGD 1,079 SGD
View
B+
Retailer 5
-
$881 USD
View
B+
Retailer 6
-
$902 USD
View
B+
Retailer 7
-
$920 USD
£724 GBP
View
B+
Retailer 8
-
$1,085 USD
€1,033 EUR
View
B+
Retailer 9
-
$1,149 USD
ZAR 18,558 ZAR
View
Retailer 10
-
$1,157 USD
A$1,780 AUD
View
Price last confirmed 30 days ago
Most Expensive
B
MOH London
713A3B4D4 · Nov 1
$1,408 USD
£1,109 GBP
View
10 more retailers have this diamond
Prices start from $576 USDSave up to $832 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
$576 USD