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Cushion|Natural|GIA

1.51ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 5231998771

Certificate GIA 5231998771

Diamond specifications and retailer prices

From $2,903 SGD
As of November 6, 2026
Save $3,666 SGD (56%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $6,569 SGD 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 J 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 5231998771. Listed at 9 retailers as of November 4, 2026, with prices from $2,903 to $6,569, a $3,666 spread on the same certified stone. MOH London lists it at $6,569. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle36.63°
OriginNatural
Grading LabGIA
CertificateGIA 5231998771
Dimensions7.56 × 5.91 × 4.13 mm
L/W Ratio1.28
Key to symbols
Crystal, Cloud, Needle
Top View
7.56 mm5.91 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231998771
Side View
Table 65.0%CrownGirdle: STK-VTKPavilion 36.63°Culet: NoneDepth 69.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,569 SGD|Low: $2,903 SGD|High: $7,386 SGD|Avg: $4,573 SGD|-11.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5$2,903 SGD
Retailer 7$3,635 SGD
Retailer 2$3,768 SGD
Retailer 4$4,041 SGD
Retailer 6$4,269 SGD
Retailer 9$4,346 SGD
Retailer 3$4,742 SGD
Retailer 8$6,176 SGD
MOH London$6,569 SGD

39 data points across 9 retailers

9 retailers$2,903 SGD to $6,569 SGD

A
Cheapest Retailer
-
$2,903 SGD
A
Retailer 2
-
$3,635 SGD
View
A
Retailer 3
-
$3,768 SGD
View
A
Retailer 4
-
$4,041 SGD
View
A
Retailer 5
-
$4,269 SGD
View
B+
Retailer 6
-
$4,346 SGD
View
B+
Retailer 7
-
$4,742 SGD
View
Retailer 8
-
$6,176 SGD
View
Price last confirmed 17 days ago
Most Expensive
B
MOH London
26E67E017 · Nov 4
$6,569 SGD
£4,036 GBP
View
8 more retailers have this diamond
Prices start from $2,903 SGDSave up to $3,666 SGD

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
$2,903 SGD