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Cushion|Natural|GIA

1.51ct I SI2 Cushion Natural Diamond

EX • I/SI2 • GIA 6551796873

Certificate GIA 6551796873

Diamond specifications and retailer prices

From $2,636 USD
As of November 6, 2026
Save $3,428 USD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $6,064 USD at MOH London · As of November 2, 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 6551796873. Listed at 8 retailers as of November 2, 2026, with prices from $2,636 to $6,064, a $3,428 spread on the same certified stone. MOH London lists it at $6,064. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle35.97°
OriginNatural
Grading LabGIA
CertificateGIA 6551796873
Dimensions7.56 × 5.87 × 4.09 mm
L/W Ratio1.29
Key to symbols
Crystal, Cloud, Feather, Knot, Needle
Top View
7.56 mm5.87 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551796873
Side View
Table 64.0%CrownGirdle: MED-VTKPavilion 35.97°Culet: NoneDepth 69.7%

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: $6,064 USD|Low: $2,636 USD|High: $6,699 USD|Avg: $4,062 USD|-9.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2$2,636 USD
Retailer 7$3,279 USD
Retailer 3$3,464 USD
Retailer 5$3,669 USD
Retailer 6$3,844 USD
Retailer 4$4,246 USD
MOH London$6,064 USD

43 data points across 7 retailers

8 retailers$2,636 USD to $6,064 USD

A
Cheapest Retailer
-
$2,636 USD
A
Retailer 2
-
$3,279 USD
View
A
Retailer 3
-
$3,464 USD
View
A
Retailer 4
-
$3,669 USD
View
A
Retailer 5
-
$3,844 USD
View
A
Retailer 6
-
$3,996 USD
View
A
Retailer 7
-
$4,246 USD
View
Most Expensive
B
MOH London
FA73139D7 · Nov 2
$6,064 USD
£4,775 GBP
View
7 more retailers have this diamond
Prices start from $2,636 USDSave up to $3,428 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
$2,636 USD