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Marquise|Natural|GIA

0.66ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 1557148705

Certificate GIA 1557148705

Diamond specifications and retailer prices

From $535 USD
SGD 723 SGD
As of October 31, 2026
Save $488 USD (48%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,023 USD 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 $535 to $1,023, a $488 spread on the same certified stone. Frank Darling lists it at $1,023. 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
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: $1,023 USD|Low: $377 USD|High: $1,137 USD|Avg: $817 USD|-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$442 USD
Retailer 8$535 USD
Retailer 9$599 USD
Retailer 6$685 USD
Retailer 12$754 USD
Retailer 5$779 USD
Retailer 7$838 USD
Retailer 2$842 USD
Retailer 4$860 USD
Retailer 10$909 USD
Frank Darling$1,023 USD
Retailer 3$1,137 USD

26 data points across 12 retailers

9 retailers$535 USD to $1,023 USD

A
Cheapest Retailer
-
$535 USD
SGD 723 SGD
A
Retailer 2
-
$599 USD
SGD 809 SGD
View
A
Retailer 3
-
$685 USD
£540 GBP
View
A
Retailer 4
-
$779 USD
View
A
Retailer 5
-
$838 USD
View
A
Retailer 6
-
$842 USD
€802 EUR
View
B+
Retailer 7
-
$860 USD
View
B+
Retailer 8
-
$909 USD
View
Most Expensive
B+
Frank Darling
2632130HK · Nov 2
$1,023 USD
View
8 more retailers have this diamond
Prices start from $535 USDSave up to $488 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 Marquise
$535 USD