Marquise|Natural|GIA

2.51ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 17154894

Certificate GIA 17154894

Diamond specifications and retailer prices

From $26,967 USD
As of November 2, 2026
Save $24,223 USD (47%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $51,190 USD 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 G 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 17154894. Listed at 10 retailers as of November 1, 2026, with prices from $26,967 to $51,190, a $24,223 spread on the same certified stone. MOH London lists it at $51,190. 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
G
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 17154894
Dimensions12.71 × 7.07 × 4.63 mm
L/W Ratio1.80
Top View
12.71 mm7.07 mm2.51 ctG / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 17154894
Side View
Table 57.0%CrownGirdle: Very ThickPavilionCuletDepth 65.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $51,190 USD|Low: $26,716 USD|High: $51,807 USD|Avg: $36,058 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 6$26,967 USD
Retailer 4$31,305 USD
Retailer 5$32,726 USD
Retailer 3$33,013 USD
Retailer 2$39,759 USD
MOH London$51,190 USD

42 data points across 6 retailers

10 retailers$26,967 USD to $51,190 USD

B+
Cheapest Retailer
-
$26,967 USD
B+
Retailer 2
-
$29,083 USD
View
B+
Retailer 3
-
$29,750 USD
A$45,769 AUD
View
Retailer 4
-
$31,305 USD
View
Price last confirmed 11 days ago
Retailer 5
-
$31,305 USD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
$31,305 USD
View
Retailer 7
-
$32,726 USD
A$50,348 AUD
View
Price last confirmed 29 days ago
B+
Retailer 8
-
$33,013 USD
£25,994 GBP
View
B
Retailer 9
-
$39,759 USD
€37,866 EUR
View
Most Expensive
B
MOH London
12C425ADA · Nov 1
$51,190 USD
£40,307 GBP
View
9 more retailers have this diamond
Prices start from $26,967 USDSave up to $24,223 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.

B+
2.51ct Marquise
$26,967 USD