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Marquise|Natural|GIA

2.50ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 3555720776

Certificate GIA 3555720776

Diamond specifications and retailer prices

From $31,909 AUD
CA$31,059 CAD
As of November 2, 2026
Save $20,539 AUD (39%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $52,448 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 2.5ct natural marquise diamond

This 2.5ct natural marquise sits in the two to three carat band, graded I 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 3555720776. Listed at 9 retailers as of November 2, 2026, with prices from $31,909 to $52,448, a $20,539 spread on the same certified stone. MOH London lists it at $52,448. 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

2.50
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 3555720776
Dimensions12.65 × 6.98 × 4.47 mm
L/W Ratio1.81
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Cavity
Top View
12.65 mm6.98 mm2.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 3555720776
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 64.0%

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: $52,448 AUD|Low: $31,909 AUD|High: $53,078 AUD|Avg: $38,124 AUD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 3, 2026
Retailer 4$31,909 AUD
Retailer 9$32,108 AUD
Retailer 3$34,469 AUD
Retailer 6$34,931 AUD
Retailer 7$36,841 AUD
Retailer 8$39,569 AUD
Retailer 2$39,608 AUD
Retailer 5$40,825 AUD
MOH London$52,448 AUD

26 data points across 9 retailers

9 retailers$31,909 AUD to $52,448 AUD

A
Cheapest Retailer
-
$31,909 AUD
CA$31,059 CAD
A
Retailer 2
-
$32,108 AUD
$22,502 USD
View
B+
Retailer 3
-
$34,469 AUD
£19,021 GBP
View
B+
Retailer 4
-
$34,931 AUD
$24,480 USD
View
B+
Retailer 5
-
$36,841 AUD
$25,819 USD
View
B
Retailer 6
-
$39,569 AUD
$27,731 USD
View
B+
Retailer 7
-
$39,608 AUD
€26,436 EUR
View
B
Retailer 8
-
$40,825 AUD
$28,611 USD
View
Most Expensive
B
MOH London
CB5FF2EBF · Nov 2
$52,448 AUD
£28,942 GBP
View
8 more retailers have this diamond
Prices start from $31,909 AUDSave up to $20,539 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.

A
2.50ct Marquise
$31,909 AUD