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Round|Natural|GIA

0.66ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 6402283719

Certificate GIA 6402283719

Diamond specifications and retailer prices

From $461 USD
HK$3,600 HKD
As of November 1, 2026
Save $1,141 USD (71%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,602 USD at Diamond Quarter · As of November 2, 2026
View at Diamond Quarter

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 6402283719. Listed at 6 retailers as of November 1, 2026, with prices from $461 to $1,602, a $1,141 spread on the same certified stone. Diamond Quarter lists it at $1,602. 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
FluorescenceFaint
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 6402283719
Dimensions5.54 × 5.52 × 3.46 mm
L/W Ratio1.00
Top View
5.54 mm5.52 mm0.66 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6402283719
Side View
Table 61.0%Crown 34.5°Girdle: MED-MEDPavilion 41.6°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: $847 USD|Low: $411 USD|High: $922 USD|Avg: $679 USD|-8.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 5$411 USD
Retailer 4$461 USD
Retailer 8$610 USD
Retailer 6$692 USD
Retailer 3$704 USD
Retailer 2$778 USD
Retailer 1$847 USD
Retailer 7$890 USD

10 data points across 8 retailers

6 retailers$461 USD to $1,602 USD

A
Cheapest Retailer
-
$461 USD
HK$3,600 HKD
A
Retailer 2
-
$566 USD
A$871 AUD
View
A
Retailer 3
-
$704 USD
View
A
Retailer 4
-
$778 USD
€741 EUR
View
A
Retailer 5
-
$847 USD
£667 GBP
View
Most Expensive
B
Diamond Quarter
0.66SI2H64193B4AN · Nov 2
$1,602 USD
£1,261 GBP
View
5 more retailers have this diamond
Prices start from $461 USDSave up to $1,141 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
$461 USD