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Cushion|Natural|GIA

0.31ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 2557421521

Certificate GIA 2557421521

Diamond specifications and retailer prices

From £121 GBP
₹15,479 INR
As of November 1, 2026
Save £284 GBP (70%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £406 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 0.31ct natural cushion diamond

This 0.31ct natural cushion sits in the sub-half-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 2557421521. Listed at 9 retailers as of November 1, 2026, with prices from £121 to £406, a £284 spread on the same certified stone. MOH London lists it at £406. 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

0.31
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2557421521
Dimensions3.75 × 3.74 × 2.51 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Needle, Twinning Wisp, Crystal
Top View
3.75 mm3.74 mm0.31 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2557421521
Side View
Table 65.0%CrownGirdle: THK-XTKPavilionCulet: NoneDepth 67.0%

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 1
Current: £406 GBP|Low: £121 GBP|High: £423 GBP|Avg: £268 GBP|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 2£121 GBP
Retailer 6£189 GBP
Retailer 8£203 GBP
Retailer 3£272 GBP
Retailer 5£272 GBP
Retailer 7£296 GBP
Retailer 9£299 GBP
Retailer 4£350 GBP
MOH London£406 GBP

35 data points across 9 retailers

9 retailers£121 GBP to £406 GBP

A
Cheapest Retailer
-
£121 GBP
₹15,479 INR
A
Retailer 2
-
£189 GBP
$253 USD
View
A
Retailer 3
-
£203 GBP
$272 USD
View
B+
Retailer 4
-
£272 GBP
View
B+
Retailer 5
-
£272 GBP
ZAR 5,893 ZAR
View
B
Retailer 6
-
£296 GBP
$397 USD
View
Retailer 7
-
£299 GBP
A$615 AUD
View
Price last confirmed 29 days ago
B
Retailer 8
-
£350 GBP
€446 EUR
View
Most Expensive
B
MOH London
886378A03 · Nov 1
£406 GBP
View
8 more retailers have this diamond
Prices start from £121 GBPSave up to £284 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
0.31ct Cushion
£121 GBP