CaratHunter
Plans
Round|Natural|GIA

0.66ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2566134555

Certificate GIA 2566134555

Diamond specifications and retailer prices

From $1,062 AUD
$744 USD
As of October 31, 2026
Save $688 AUD (39%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,749 AUD at Frank Darling · As of November 2, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566134555. Listed at 11 retailers as of October 31, 2026, with prices from $1,062 to $1,749, a $688 spread on the same certified stone. Frank Darling lists it at $1,749. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2566134555
Dimensions5.67 × 5.71 × 3.42 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.67 mm5.71 mm0.66 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566134555
Side View
Table 59.0%Crown 32.5°Girdle: THN-MEDPavilion 41.4°Culet: NoneDepth 60.1%

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: $1,749 AUD|Low: $1,062 AUD|High: $1,805 AUD|Avg: $1,383 AUD|-3.1%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 9$1,062 AUD
Retailer 6$1,117 AUD
Retailer 3$1,157 AUD
Retailer 10$1,181 AUD
Retailer 4$1,276 AUD
Retailer 5$1,334 AUD
Retailer 11$1,337 AUD
Retailer 7$1,522 AUD
Retailer 2$1,549 AUD
Retailer 8$1,714 AUD
Frank Darling$1,749 AUD

30 data points across 11 retailers

11 retailers$1,062 AUD to $1,749 AUD

A
Cheapest Retailer
-
$1,062 AUD
$744 USD
A
Retailer 2
-
$1,117 AUD
SGD 1,058 SGD
View
A
Retailer 3
-
$1,157 AUD
SGD 1,096 SGD
View
A
Retailer 4
-
$1,181 AUD
$828 USD
View
B+
Retailer 5
-
$1,276 AUD
£704 GBP
View
B+
Retailer 6
-
$1,334 AUD
$935 USD
View
B+
Retailer 7
-
$1,337 AUD
$937 USD
View
B+
Retailer 8
-
$1,522 AUD
£840 GBP
View
B+
Retailer 9
-
$1,549 AUD
€1,034 EUR
View
Retailer 10
-
$1,714 AUD
$1,201 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2677081HK · Nov 2
$1,749 AUD
$1,226 USD
View
10 more retailers have this diamond
Prices start from $1,062 AUDSave up to $688 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.

A
0.66ct Round
$1,062 AUD