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Marquise|Natural|GIA

2.51ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 17154894

Certificate GIA 17154894

Diamond specifications and retailer prices

From $38,614 AUD
$26,967 USD
As of November 2, 2026
Save $34,685 AUD (47%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $73,299 AUD at MOH London · As of November 2, 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 2, 2026, with prices from $38,614 to $73,299, a $34,685 spread on the same certified stone. MOH London lists it at $73,299. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $73,299 AUD|Low: $38,255 AUD|High: $74,183 AUD|Avg: $51,638 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 3, 2026
Retailer 6$38,614 AUD
Retailer 4$44,826 AUD
Retailer 5$46,861 AUD
Retailer 3$47,271 AUD
Retailer 2$56,710 AUD
MOH London$73,299 AUD

42 data points across 6 retailers

10 retailers$38,614 AUD to $73,299 AUD

B+
Cheapest Retailer
-
$38,614 AUD
$26,967 USD
B+
Retailer 2
-
$41,644 AUD
$29,083 USD
View
B+
Retailer 3
-
$42,599 AUD
View
Retailer 4
-
$44,826 AUD
$31,305 USD
View
Price last confirmed 13 days ago
Retailer 5
-
$44,826 AUD
$31,305 USD
View
Price last confirmed 27 days ago
B+
Retailer 6
-
$44,826 AUD
$31,305 USD
View
Retailer 7
-
$46,861 AUD
View
Price last confirmed 30 days ago
B+
Retailer 8
-
$47,271 AUD
£25,994 GBP
View
B
Retailer 9
-
$56,710 AUD
€37,719 EUR
View
Most Expensive
B
MOH London
12C425ADA · Nov 2
$73,299 AUD
£40,307 GBP
View
9 more retailers have this diamond
Prices start from $38,614 AUDSave up to $34,685 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.

B+
2.51ct Marquise
$38,614 AUD