CaratHunter
Plans
Marquise|Natural|GIA

0.66ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 1557148705

Certificate GIA 1557148705

Diamond specifications and retailer prices

From $763 AUD
SGD 723 SGD
As of October 31, 2026
Save $697 AUD (48%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,460 AUD at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 0.66ct natural marquise diamond

This 0.66ct natural marquise 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 stated by the retailer rather than the lab and certified by GIA 1557148705. Listed at 9 retailers as of October 31, 2026, with prices from $763 to $1,460, a $697 spread on the same certified stone. Frank Darling lists it at $1,460. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle39.67°
Pavilion angle39.39°
OriginNatural
Grading LabGIA
CertificateGIA 1557148705
Dimensions8.66 × 4.56 × 2.81 mm
L/W Ratio1.90
Culet sizeNone
Top View
8.66 mm4.56 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1557148705
Side View
Table 60.0%Crown 39.67°Girdle: VTN-VTKPavilion 39.39°Culet: NoneDepth 61.7%

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: $1,460 AUD|Low: $538 AUD|High: $1,622 AUD|Avg: $1,165 AUD|-8.1%
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 2, 2026
Retailer 11$631 AUD
Retailer 8$763 AUD
Retailer 9$854 AUD
Retailer 6$978 AUD
Retailer 12$1,076 AUD
Retailer 5$1,111 AUD
Retailer 7$1,196 AUD
Retailer 2$1,202 AUD
Retailer 4$1,227 AUD
Retailer 10$1,297 AUD
Frank Darling$1,460 AUD
Retailer 3$1,622 AUD

26 data points across 12 retailers

9 retailers$763 AUD to $1,460 AUD

A
Cheapest Retailer
-
$763 AUD
SGD 723 SGD
A
Retailer 2
-
$854 AUD
SGD 809 SGD
View
A
Retailer 3
-
$978 AUD
£540 GBP
View
A
Retailer 4
-
$1,111 AUD
$779 USD
View
A
Retailer 5
-
$1,196 AUD
$838 USD
View
A
Retailer 6
-
$1,202 AUD
€802 EUR
View
B+
Retailer 7
-
$1,227 AUD
$860 USD
View
B+
Retailer 8
-
$1,297 AUD
$909 USD
View
Most Expensive
B+
Frank Darling
2632130HK · Nov 2
$1,460 AUD
$1,023 USD
View
8 more retailers have this diamond
Prices start from $763 AUDSave up to $697 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 Marquise
$763 AUD