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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 $30,012 CAD
$21,485 USD
As of October 31, 2026
Save $19,028 CAD (39%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $49,040 CAD 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 10 retailers as of October 31, 2026, with prices from $30,012 to $49,040, a $19,028 spread on the same certified stone. MOH London lists it at $49,040. 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
Color
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: Oct 31
Current: $49,040 CAD|Low: $24,550 CAD|High: $49,631 CAD|Avg: $33,615 CAD|-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 1, 2026
Retailer 9$24,550 CAD
Retailer 4$26,454 CAD
Retailer 8$26,817 CAD
Retailer 17$29,826 CAD
Retailer 3$30,012 CAD
Retailer 10$30,317 CAD
Retailer 2$31,955 CAD
Retailer 15$32,650 CAD
Retailer 18$33,042 CAD
Retailer 5$34,056 CAD
Retailer 7$34,056 CAD
Retailer 11$34,435 CAD
Retailer 6$35,188 CAD
Retailer 13$36,975 CAD
Retailer 12$36,986 CAD
Retailer 14$38,160 CAD
Retailer 16$44,484 CAD
MOH London$49,040 CAD

14 data points across 18 retailers

10 retailers$30,012 CAD to $49,040 CAD

A
Cheapest Retailer
-
$30,012 CAD
$21,485 USD
A
Retailer 2
-
$31,955 CAD
£18,012 GBP
View
Retailer 3
-
$32,650 CAD
$23,373 USD
View
Price last confirmed 10 days ago
Retailer 4
-
$33,042 CAD
$23,654 USD
View
Price last confirmed 10 days ago
B+
Retailer 5
-
$34,435 CAD
$24,651 USD
View
B+
Retailer 6
-
$36,975 CAD
€25,209 EUR
View
B+
Retailer 7
-
$36,986 CAD
$26,477 USD
View
Retailer 8
-
$38,160 CAD
$27,317 USD
View
Price last confirmed 10 days ago
Retailer 9
-
$44,484 CAD
$31,845 USD
View
Price last confirmed 11 days ago
Most Expensive
B
MOH London
ED73D92D5 · Nov 1
$49,040 CAD
£27,643 GBP
View
9 more retailers have this diamond
Prices start from $30,012 CADSave up to $19,028 CAD

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
$30,012 CAD