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Round|Natural|GIA

0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 5241025206

Certificate GIA 5241025206

Diamond specifications and retailer prices

From $917 AUD
SGD 868 SGD
As of October 31, 2026
Save $743 AUD (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,660 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5241025206. Listed at 12 retailers as of October 31, 2026, with prices from $917 to $1,660, a $743 spread on the same certified stone. Frank Darling lists it at $1,660. 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
Crown angle34.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 5241025206
Dimensions5.57 × 5.58 × 3.49 mm
L/W Ratio1.00
Culet sizeNone
Top View
5.57 mm5.58 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241025206
Side View
Table 56.0%Crown 34.5°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.5%

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: $1,660 AUD|Low: $917 AUD|High: $1,707 AUD|Avg: $1,287 AUD|-2.8%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 6$917 AUD
Retailer 11$999 AUD
Retailer 4$1,062 AUD
Retailer 3$1,089 AUD
Retailer 9$1,116 AUD
Retailer 5$1,184 AUD
Retailer 10$1,383 AUD
Retailer 7$1,423 AUD
Retailer 2$1,428 AUD
Retailer 12$1,487 AUD
Retailer 8$1,589 AUD
Frank Darling$1,660 AUD

44 data points across 12 retailers

12 retailers$917 AUD to $1,660 AUD

A
Cheapest Retailer
-
$917 AUD
SGD 868 SGD
A
Retailer 2
-
$999 AUD
$700 USD
View
A
Retailer 3
-
$1,062 AUD
SGD 1,006 SGD
View
A
Retailer 4
-
$1,089 AUD
$763 USD
View
A
Retailer 5
-
$1,116 AUD
$782 USD
View
A
Retailer 6
-
$1,184 AUD
£653 GBP
View
B+
Retailer 7
-
$1,383 AUD
$969 USD
View
B+
Retailer 8
-
$1,423 AUD
£785 GBP
View
B+
Retailer 9
-
$1,428 AUD
€953 EUR
View
B+
Retailer 10
-
$1,487 AUD
$1,042 USD
View
Retailer 11
-
$1,589 AUD
$1,114 USD
View
Price last confirmed 7 days ago
Most Expensive
B+
Frank Darling
2669868HK · Nov 2
$1,660 AUD
$1,163 USD
View
11 more retailers have this diamond
Prices start from $917 AUDSave up to $743 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
$917 AUD