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Cushion|Natural|GIA

1.51ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 6555299261

Certificate GIA 6555299261

Diamond specifications and retailer prices

From £1,759 GBP
As of November 5, 2026
Save £2,208 GBP (56%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,967 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555299261. Listed at 7 retailers as of November 4, 2026, with prices from £1,759 to £3,967, a £2,208 spread on the same certified stone. MOH London lists it at £3,967. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555299261
Dimensions7.68 × 5.91 × 4.12 mm
L/W Ratio1.30
Key to symbols
Crystal, Feather, Pinpoint, Cloud, Needle
Top View
7.68 mm5.91 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555299261
Side View
Table 65.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 69.6%

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: £3,967 GBP|Low: £1,759 GBP|High: £4,515 GBP|Avg: £2,641 GBP|-12.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 4£1,759 GBP
Retailer 6£2,028 GBP
Retailer 5£2,192 GBP
Retailer 7£2,272 GBP
Retailer 3£2,441 GBP
Retailer 2£2,854 GBP
MOH London£3,967 GBP

33 data points across 7 retailers

7 retailers£1,759 GBP to £3,967 GBP

A
Cheapest Retailer
-
£1,759 GBP
A
Retailer 2
-
£2,028 GBP
View
A
Retailer 3
-
£2,192 GBP
View
A
Retailer 4
-
£2,272 GBP
View
Final sale: no returns
A
Retailer 5
-
£2,441 GBP
View
B+
Retailer 6
-
£2,854 GBP
View
Most Expensive
B
MOH London
9F507C93D · Nov 4
£3,967 GBP
View
6 more retailers have this diamond
Prices start from £1,759 GBPSave up to £2,208 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
£1,759 GBP