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Marquise|Natural|GIA

2.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 6551291620

Certificate GIA 6551291620

Diamond specifications and retailer prices

From $27,306 SGD
CA$29,655 CAD
As of November 2, 2026
Save $17,591 SGD (39%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $44,898 SGD at MOH London · As of November 1, 2026
View at MOH London

About this 2.51ct natural marquise diamond

This 2.51ct natural marquise sits in the two to three carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551291620. Listed at 11 retailers as of November 1, 2026, with prices from $27,306 to $44,898, a $17,591 spread on the same certified stone. MOH London lists it at $44,898. 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

2.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.07°
OriginNatural
Grading LabGIA
CertificateGIA 6551291620
Dimensions13.51 × 7.14 × 4.53 mm
L/W Ratio1.89
Key to symbols
Twinning Wisp, Feather, Crystal, Needle
Top View
13.51 mm7.14 mm2.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551291620
Side View
Table 62.0%CrownGirdle: STK-VTKPavilion 40.07°Culet: NoneDepth 63.5%

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: Nov 2
Current: $44,898 SGD|Low: $22,476 SGD|High: $45,439 SGD|Avg: $30,865 SGD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 9$22,476 SGD
Retailer 4$24,220 SGD
Retailer 8$24,552 SGD
Retailer 2$27,306 SGD
Retailer 3$27,477 SGD
Retailer 10$27,756 SGD
Retailer 13$29,501 SGD
Retailer 11$29,892 SGD
Retailer 18$30,251 SGD
Retailer 5$31,180 SGD
Retailer 7$31,180 SGD
Retailer 14$31,526 SGD
Retailer 6$32,215 SGD
Retailer 15$33,861 SGD
Retailer 12$33,958 SGD
Retailer 16$34,936 SGD
Retailer 17$40,727 SGD
MOH London$44,898 SGD

14 data points across 18 retailers

11 retailers$27,306 SGD to $44,898 SGD

Cheapest Retailer
-
$27,306 SGD
CA$29,655 CAD
A
Retailer 2
-
$27,477 SGD
$21,485 USD
View
A
Retailer 3
-
$29,501 SGD
£18,163 GBP
View
B+
Retailer 4
-
$29,892 SGD
$23,373 USD
View
Retailer 5
-
$30,251 SGD
$23,654 USD
View
Price last confirmed 11 days ago
B+
Retailer 6
-
$31,526 SGD
$24,651 USD
View
B+
Retailer 7
-
$33,861 SGD
$26,477 USD
View
B+
Retailer 8
-
$33,958 SGD
€25,288 EUR
View
Retailer 9
-
$34,936 SGD
$27,317 USD
View
Price last confirmed 12 days ago
Retailer 10
-
$40,727 SGD
$31,845 USD
View
Price last confirmed 12 days ago
Most Expensive
B
MOH London
ED73D92D5 · Nov 1
$44,898 SGD
£27,643 GBP
View
10 more retailers have this diamond
Prices start from $27,306 SGDSave up to $17,591 SGD

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
2.51ct Marquise
$27,306 SGD