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Round|Natural|GIA

0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2231688609

Certificate GIA 2231688609

Diamond specifications and retailer prices

From $1,491 AUD
$1,045 USD
As of November 1, 2026
Save $1,651 AUD (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $3,142 AUD 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 2231688609. Listed at 10 retailers as of November 1, 2026, with prices from $1,491 to $3,142, a $1,651 spread on the same certified stone. MOH London lists it at $3,142. 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
OriginNatural
Grading LabGIA
CertificateGIA 2231688609
Dimensions5.58 × 5.61 × 3.44 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.58 mm5.61 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2231688609
Side View
Table 59.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 61.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $3,142 AUD|Low: $1,853 AUD|High: $3,180 AUD|Avg: $2,373 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 3, 2026
Retailer 6$1,938 AUD
Retailer 2$1,946 AUD
Retailer 3$2,216 AUD
Retailer 4$2,243 AUD
Retailer 5$2,790 AUD
MOH London$3,142 AUD

43 data points across 6 retailers

10 retailers$1,491 AUD to $3,142 AUD

B+
Cheapest Retailer
-
$1,491 AUD
$1,045 USD
B
Retailer 2
-
$1,869 AUD
$1,310 USD
View
B
Retailer 3
-
$1,869 AUD
$1,310 USD
View
B
Retailer 4
-
$1,938 AUD
$1,358 USD
View
B
Retailer 5
-
$1,941 AUD
$1,360 USD
View
B
Retailer 6
-
$1,946 AUD
£1,074 GBP
View
B
Retailer 7
-
$2,216 AUD
€1,479 EUR
View
Retailer 8
-
$2,243 AUD
View
Price last confirmed 29 days ago
B
Retailer 9
-
$2,790 AUD
CA$2,716 CAD
View
Most Expensive
B
MOH London
F73821336 · Nov 1
$3,142 AUD
£1,734 GBP
View
9 more retailers have this diamond
Prices start from $1,491 AUDSave up to $1,651 AUD

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.

B+
0.66ct Round
$1,491 AUD