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Cushion|Natural|GIA

1.51ct I SI2 Cushion Natural Diamond

ID • I/SI2 • GIA 7551678990

Certificate GIA 7551678990

Diamond specifications and retailer prices

From $4,387 AUD
As of November 6, 2026
Save $4,609 AUD (51%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $8,996 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 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 7551678990. Listed at 11 retailers as of November 4, 2026, with prices from $4,387 to $8,996, a $4,609 spread on the same certified stone. MOH London lists it at $8,996. 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
I
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.63°
Pavilion angle36.04°
OriginNatural
Grading LabGIA
CertificateGIA 7551678990
Dimensions5.96 × 7.47 × 4.11 mm
L/W Ratio1.25
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
5.96 mm7.47 mm1.51 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7551678990
Side View
Table 65.0%Crown 37.63°Girdle: Very ThickPavilion 36.04°Culet: NoneDepth 69.0%

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 6
Current: $8,996 AUD|Low: $4,017 AUD|High: $9,410 AUD|Avg: $5,951 AUD|-4.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 5$4,387 AUD
Retailer 6$4,491 AUD
Retailer 4$4,669 AUD
Retailer 2$4,855 AUD
Retailer 11$5,095 AUD
Retailer 7$5,103 AUD
Retailer 9$5,411 AUD
Retailer 8$5,471 AUD
Retailer 3$5,560 AUD
Retailer 10$5,663 AUD
MOH London$8,996 AUD

42 data points across 11 retailers

11 retailers$4,387 AUD to $8,996 AUD

A
Cheapest Retailer
-
$4,387 AUD
A
Retailer 2
-
$4,491 AUD
View
A
Retailer 3
-
$4,669 AUD
View
A
Retailer 4
-
$4,855 AUD
View
Final sale: no returns
A
Retailer 5
-
$5,095 AUD
View
A
Retailer 6
-
$5,103 AUD
View
A
Retailer 7
-
$5,257 AUD
View
A
Retailer 8
-
$5,411 AUD
View
A
Retailer 9
-
$5,471 AUD
View
A
Retailer 10
-
$5,663 AUD
View
Most Expensive
B
MOH London
ADAA463D8 · Nov 4
$8,996 AUD
£4,867 GBP
View
10 more retailers have this diamond
Prices start from $4,387 AUDSave up to $4,609 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
$4,387 AUD