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Cushion|Natural|GIA

1.51ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 3555303625

Certificate GIA 3555303625

Diamond specifications and retailer prices

From $3,808 CAD
As of November 5, 2026
Save $4,538 CAD (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,346 CAD 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 $3,808 to $8,346, a $4,538 spread on the same certified stone. MOH London lists it at $8,346. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $8,346 CAD|Low: $3,808 CAD|High: $8,843 CAD|Avg: $5,325 CAD|-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$3,808 CAD
Retailer 3$3,853 CAD
Retailer 8$4,095 CAD
Retailer 10$4,169 CAD
Retailer 9$4,185 CAD
Retailer 12$4,396 CAD
Retailer 4$4,673 CAD
Retailer 13$5,141 CAD
Retailer 6$5,148 CAD
Retailer 2$5,826 CAD
Retailer 7$6,107 CAD
Retailer 11$7,881 CAD
MOH London$8,346 CAD

34 data points across 13 retailers

14 retailers$3,808 CAD to $8,346 CAD

A
Cheapest Retailer
-
$3,808 CAD
A
Retailer 2
-
$3,853 CAD
View
A
Retailer 3
-
$4,095 CAD
View
A
Retailer 4
-
$4,169 CAD
View
A
Retailer 5
-
$4,185 CAD
View
Final sale: no returns
A
Retailer 6
-
$4,396 CAD
View
A
Retailer 7
-
$4,673 CAD
View
B+
Retailer 8
-
$5,141 CAD
View
B+
Retailer 9
-
$5,148 CAD
View
B+
Retailer 10
-
$5,218 CAD
View
B+
Retailer 11
-
$5,826 CAD
View
B+
Retailer 12
-
$6,107 CAD
View
B
Retailer 13
-
$7,881 CAD
View
Most Expensive
B
MOH London
A225B3F8E · Nov 4
$8,346 CAD
£4,672 GBP
View
13 more retailers have this diamond
Prices start from $3,808 CADSave up to $4,538 CAD

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
$3,808 CAD