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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 $3,014 USD
As of November 6, 2026
Save $3,167 USD (51%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $6,181 USD 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 $3,014 to $6,181, a $3,167 spread on the same certified stone. MOH London lists it at $6,181. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,181 USD|Low: $2,760 USD|High: $6,466 USD|Avg: $4,089 USD|-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$3,014 USD
Retailer 6$3,086 USD
Retailer 4$3,208 USD
Retailer 2$3,336 USD
Retailer 11$3,501 USD
Retailer 7$3,506 USD
Retailer 9$3,718 USD
Retailer 8$3,759 USD
Retailer 3$3,820 USD
Retailer 10$3,891 USD
MOH London$6,181 USD

42 data points across 11 retailers

11 retailers$3,014 USD to $6,181 USD

A
Cheapest Retailer
-
$3,014 USD
A
Retailer 2
-
$3,086 USD
View
A
Retailer 3
-
$3,208 USD
View
A
Retailer 4
-
$3,336 USD
View
Final sale: no returns
A
Retailer 5
-
$3,501 USD
View
A
Retailer 6
-
$3,506 USD
View
A
Retailer 7
-
$3,612 USD
View
A
Retailer 8
-
$3,718 USD
View
A
Retailer 9
-
$3,759 USD
View
A
Retailer 10
-
$3,891 USD
View
Most Expensive
B
MOH London
ADAA463D8 · Nov 4
$6,181 USD
£4,867 GBP
View
10 more retailers have this diamond
Prices start from $3,014 USDSave up to $3,167 USD

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
$3,014 USD