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Cushion|Natural|GIA

1.51ct K SI2 Cushion Natural Diamond

EX • K/SI2 • GIA 2566006105

Certificate GIA 2566006105

Diamond specifications and retailer prices

From $1,817 USD
As of November 6, 2026
Save $2,483 USD (58%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $4,300 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2566006105. Listed at 7 retailers as of November 4, 2026, with prices from $1,817 to $4,300, a $2,483 spread on the same certified stone. MOH London lists it at $4,300. 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
K
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2566006105
Dimensions7.52 × 5.93 × 4.11 mm
L/W Ratio1.27
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
7.52 mm5.93 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566006105
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NDepth 69.3%

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: $4,300 USD|Low: $1,792 USD|High: $4,364 USD|Avg: $2,695 USD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$1,817 USD
Retailer 7$2,273 USD
Retailer 3$2,452 USD
Retailer 5$2,518 USD
Retailer 2$2,542 USD
Retailer 4$3,142 USD
MOH London$4,300 USD

32 data points across 7 retailers

7 retailers$1,817 USD to $4,300 USD

A
Cheapest Retailer
-
$1,817 USD
B+
Retailer 2
-
$2,273 USD
View
A
Retailer 3
-
$2,452 USD
View
B+
Retailer 4
-
$2,518 USD
View
B+
Retailer 5
-
$2,542 USD
View
B+
Retailer 6
-
$3,142 USD
View
Most Expensive
B
MOH London
051E64C1E · Nov 4
$4,300 USD
£3,386 GBP
View
6 more retailers have this diamond
Prices start from $1,817 USDSave up to $2,483 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
$1,817 USD