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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 €2,425 EUR
As of November 5, 2026
Save €2,890 EUR (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €5,314 EUR 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 €2,425 to €5,314, a €2,890 spread on the same certified stone. MOH London lists it at €5,314. 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
Colour
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: €5,314 EUR|Low: €2,425 EUR|High: €5,631 EUR|Avg: €3,368 EUR|-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 7, 2026
Retailer 5€2,425 EUR
Retailer 3€2,453 EUR
Retailer 8€2,607 EUR
Retailer 10€2,655 EUR
Retailer 9€2,665 EUR
Retailer 12€2,799 EUR
Retailer 4€2,975 EUR
Retailer 13€3,274 EUR
Retailer 2€3,297 EUR
Retailer 6€3,710 EUR
Retailer 7€3,889 EUR
Retailer 11€5,018 EUR
MOH London€5,314 EUR

34 data points across 13 retailers

14 retailers€2,425 EUR to €5,314 EUR

A
Cheapest Retailer
-
€2,425 EUR
A
Retailer 2
-
€2,453 EUR
View
A
Retailer 3
-
€2,607 EUR
View
A
Retailer 4
-
€2,655 EUR
View
A
Retailer 5
-
€2,665 EUR
View
Final sale: no returns
A
Retailer 6
-
€2,799 EUR
View
A
Retailer 7
-
€2,975 EUR
View
B+
Retailer 8
-
€3,274 EUR
View
B+
Retailer 9
-
€3,297 EUR
View
B+
Retailer 10
-
€3,323 EUR
View
B+
Retailer 11
-
€3,710 EUR
View
B+
Retailer 12
-
€3,889 EUR
View
B
Retailer 13
-
€5,018 EUR
View
Most Expensive
B
MOH London
A225B3F8E · Nov 4
€5,314 EUR
£4,672 GBP
View
13 more retailers have this diamond
Prices start from €2,425 EURSave up to €2,890 EUR

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
€2,425 EUR