CaratHunter
Plans
Cushion|Natural|GIA

1.51ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 3555303625

Certificate GIA 3555303625

Diamond specifications and retailer prices

From £2,022 GBP
As of November 5, 2026
Save £2,411 GBP (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,433 GBP 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 £2,022 to £4,433, a £2,411 spread on the same certified stone. MOH London lists it at £4,433. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £4,433 GBP|Low: £2,022 GBP|High: £4,697 GBP|Avg: £2,828 GBP|-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£2,022 GBP
Retailer 3£2,046 GBP
Retailer 8£2,175 GBP
Retailer 10£2,214 GBP
Retailer 9£2,223 GBP
Retailer 12£2,335 GBP
Retailer 4£2,482 GBP
Retailer 13£2,731 GBP
Retailer 6£2,734 GBP
Retailer 2£3,095 GBP
Retailer 7£3,244 GBP
Retailer 11£4,186 GBP
MOH London£4,433 GBP

34 data points across 13 retailers

14 retailers£2,022 GBP to £4,433 GBP

A
Cheapest Retailer
-
£2,022 GBP
A
Retailer 2
-
£2,046 GBP
View
A
Retailer 3
-
£2,175 GBP
View
A
Retailer 4
-
£2,214 GBP
View
A
Retailer 5
-
£2,223 GBP
View
Final sale: no returns
A
Retailer 6
-
£2,335 GBP
View
A
Retailer 7
-
£2,482 GBP
View
B+
Retailer 8
-
£2,731 GBP
View
B+
Retailer 9
-
£2,734 GBP
View
B+
Retailer 10
-
£2,772 GBP
View
B+
Retailer 11
-
£3,095 GBP
View
B+
Retailer 12
-
£3,244 GBP
View
B
Retailer 13
-
£4,186 GBP
View
Most Expensive
B
MOH London
A225B3F8E · Nov 4
£4,433 GBP
View
13 more retailers have this diamond
Prices start from £2,022 GBPSave up to £2,411 GBP

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
£2,022 GBP