CaratHunter
Plans
Cushion|Natural|GIA

1.51ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 5231998771

Certificate GIA 5231998771

Diamond specifications and retailer prices

From £1,692 GBP
As of November 6, 2026
Save £2,137 GBP (56%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £3,829 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 5231998771. Listed at 9 retailers as of November 4, 2026, with prices from £1,692 to £3,829, a £2,137 spread on the same certified stone. MOH London lists it at £3,829. 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
Pavilion angle36.63°
OriginNatural
Grading LabGIA
CertificateGIA 5231998771
Dimensions7.56 × 5.91 × 4.13 mm
L/W Ratio1.28
Key to symbols
Crystal, Cloud, Needle
Top View
7.56 mm5.91 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231998771
Side View
Table 65.0%CrownGirdle: STK-VTKPavilion 36.63°Culet: NoneDepth 69.8%

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 6
Current: £3,829 GBP|Low: £1,692 GBP|High: £4,306 GBP|Avg: £2,666 GBP|-11.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5£1,692 GBP
Retailer 7£2,119 GBP
Retailer 2£2,197 GBP
Retailer 4£2,356 GBP
Retailer 6£2,489 GBP
Retailer 9£2,533 GBP
Retailer 3£2,764 GBP
Retailer 8£3,600 GBP
MOH London£3,829 GBP

39 data points across 9 retailers

9 retailers£1,692 GBP to £3,829 GBP

A
Cheapest Retailer
-
£1,692 GBP
A
Retailer 2
-
£2,119 GBP
View
A
Retailer 3
-
£2,197 GBP
View
A
Retailer 4
-
£2,356 GBP
View
A
Retailer 5
-
£2,489 GBP
View
B+
Retailer 6
-
£2,533 GBP
View
B+
Retailer 7
-
£2,764 GBP
View
Retailer 8
-
£3,600 GBP
View
Price last confirmed 17 days ago
Most Expensive
B
MOH London
26E67E017 · Nov 4
£3,829 GBP
View
8 more retailers have this diamond
Prices start from £1,692 GBPSave up to £2,137 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
£1,692 GBP