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Cushion|Natural|GIA

2.51ct I SI2 Cushion Natural Diamond

EX • I/SI2 • GIA 1553315263

Certificate GIA 1553315263

Diamond specifications and retailer prices

From $17,939 AUD
$12,601 USD
As of November 1, 2026
Save $13,128 AUD (42%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $31,066 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 2.51ct natural cushion diamond

This 2.51ct natural cushion 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 1553315263. Listed at 5 retailers as of October 29, 2026, with prices from $17,939 to $31,066, a $13,128 spread on the same certified stone. MOH London lists it at $31,066. 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
OriginNatural
Grading LabGIA
CertificateGIA 1553315263
Dimensions8.44 × 6.75 × 4.77 mm
L/W Ratio1.25
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
8.44 mm6.75 mm2.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553315263
Side View
Table 62.0%CrownGirdlePavilionCulet: NoneDepth 70.6%

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 1
Current: $31,066 AUD|Low: $16,327 AUD|High: $31,066 AUD|Avg: $22,236 AUD|+1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 5$16,327 AUD
Retailer 2$17,939 AUD
Retailer 6$19,518 AUD
Retailer 3$19,787 AUD
Retailer 8$21,558 AUD
Retailer 4$24,893 AUD
Retailer 7$24,926 AUD
MOH London$31,066 AUD

17 data points across 8 retailers

5 retailers$17,939 AUD to $31,066 AUD

A
Cheapest Retailer
-
$17,939 AUD
$12,601 USD
A
Retailer 2
-
$19,518 AUD
$13,710 USD
View
A
Retailer 3
-
$19,787 AUD
$13,899 USD
View
B+
Retailer 4
-
$24,893 AUD
€16,653 EUR
View
Most Expensive
B
MOH London
C24107470 · Oct 29
$31,066 AUD
£17,183 GBP
View
4 more retailers have this diamond
Prices start from $17,939 AUDSave up to $13,128 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
2.51ct Cushion
$17,939 AUD