Cushion|Natural|GIA

1.51ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 3555303625

Certificate GIA 3555303625

Diamond specifications and retailer prices

From $2,707 USD
As of November 5, 2026
Save $3,226 USD (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,933 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3555303625. Listed at 14 retailers as of November 4, 2026, with prices from $2,707 to $5,933, a $3,226 spread on the same certified stone. MOH London lists it at $5,933. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3555303625
Dimensions7.82 × 6.01 × 4.00 mm
L/W Ratio1.30
Girdle conditionFaceted
Top View
7.82 mm6.01 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555303625
Side View
Table 65.0%CrownGirdle: ThickPavilionCulet: NoneDepth 66.6%

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 5
Current: $5,933 USD|Low: $2,707 USD|High: $6,287 USD|Avg: $3,786 USD|-5.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 5$2,707 USD
Retailer 3$2,739 USD
Retailer 8$2,911 USD
Retailer 10$2,964 USD
Retailer 9$2,975 USD
Retailer 12$3,125 USD
Retailer 4$3,322 USD
Retailer 13$3,655 USD
Retailer 6$3,660 USD
Retailer 2$4,142 USD
Retailer 7$4,342 USD
Retailer 11$5,603 USD
MOH London$5,933 USD

34 data points across 13 retailers

14 retailers$2,707 USD to $5,933 USD

A
Cheapest Retailer
-
$2,707 USD
A
Retailer 2
-
$2,739 USD
View
A
Retailer 3
-
$2,911 USD
View
A
Retailer 4
-
$2,964 USD
View
A
Retailer 5
-
$2,975 USD
View
Final sale: no returns
A
Retailer 6
-
$3,125 USD
View
A
Retailer 7
-
$3,322 USD
View
B+
Retailer 8
-
$3,655 USD
View
B+
Retailer 9
-
$3,660 USD
View
B+
Retailer 10
-
$3,710 USD
View
B+
Retailer 11
-
$4,142 USD
View
B+
Retailer 12
-
$4,342 USD
View
B
Retailer 13
-
$5,603 USD
View
Most Expensive
B
MOH London
A225B3F8E · Nov 4
$5,933 USD
£4,672 GBP
View
13 more retailers have this diamond
Prices start from $2,707 USDSave up to $3,226 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
$2,707 USD