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Cushion|Natural|GIA

1.51ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 2557386199

Certificate GIA 2557386199

Diamond specifications and retailer prices

From $4,861 AUD
As of November 6, 2026
Save $5,566 AUD (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $10,427 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two 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 2557386199. Listed at 10 retailers as of November 4, 2026, with prices from $4,861 to $10,427, a $5,566 spread on the same certified stone. MOH London lists it at $10,427. 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

1.51
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle36.68°
OriginNatural
Grading LabGIA
CertificateGIA 2557386199
Dimensions7.59 × 5.90 × 4.09 mm
L/W Ratio1.29
Key to symbols
Crystal, Needle
Top View
7.59 mm5.90 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557386199
Side View
Table 66.0%CrownGirdle: THK-VTKPavilion 36.68°Culet: NoneDepth 69.3%

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 6
Current: $10,427 AUD|Low: $4,844 AUD|High: $11,848 AUD|Avg: $7,146 AUD|-11.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 6$4,861 AUD
Retailer 5$5,678 AUD
Retailer 7$5,832 AUD
Retailer 4$6,015 AUD
Retailer 2$6,044 AUD
Retailer 8$6,992 AUD
Retailer 3$7,503 AUD
Retailer 9$7,511 AUD
MOH London$10,427 AUD

33 data points across 9 retailers

10 retailers$4,861 AUD to $10,427 AUD

A
Cheapest Retailer
-
$4,861 AUD
A
Retailer 2
-
$5,678 AUD
View
A
Retailer 3
-
$5,832 AUD
View
A
Retailer 4
-
$6,015 AUD
View
A
Retailer 5
-
$6,044 AUD
View
A
Retailer 6
-
$6,992 AUD
View
A
Retailer 7
-
$7,503 AUD
View
A
Retailer 8
-
$7,511 AUD
View
Final sale: no returns
B+
Retailer 9
-
$7,565 AUD
View
Most Expensive
B+
MOH London
A5213C48E · Nov 4
$10,427 AUD
£5,641 GBP
View
9 more retailers have this diamond
Prices start from $4,861 AUDSave up to $5,566 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
1.51ct Cushion
$4,861 AUD