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Cushion|Natural|GIA

0.31ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 2557871850

Certificate GIA 2557871850

Diamond specifications and retailer prices

From £257 GBP
$344 USD
As of November 1, 2026
Save £370 GBP (59%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £627 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 H 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 2557871850. Listed at 9 retailers as of November 1, 2026, with prices from £257 to £627, a £370 spread on the same certified stone. MOH London lists it at £627. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557871850
Dimensions3.89 × 3.71 × 2.55 mm
L/W Ratio1.05
Key to symbols
Crystal
Top View
3.89 mm3.71 mm0.31 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557871850
Side View
Table 64.0%CrownGirdle: STK-VTKPavilionCulet: NDepth 68.7%

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: £627 GBP|Low: £257 GBP|High: £629 GBP|Avg: £460 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 8£257 GBP
Retailer 7£293 GBP
Retailer 3£353 GBP
Retailer 6£372 GBP
Retailer 5£421 GBP
Retailer 9£432 GBP
Retailer 4£499 GBP
Retailer 2£549 GBP
MOH London£627 GBP

37 data points across 9 retailers

9 retailers£257 GBP to £627 GBP

A
Cheapest Retailer
-
£257 GBP
$344 USD
B+
Retailer 2
-
£293 GBP
$392 USD
View
B
Retailer 3
-
£353 GBP
View
B+
Retailer 4
-
£372 GBP
View
B
Retailer 5
-
£421 GBP
ZAR 9,108 ZAR
View
Retailer 6
-
£432 GBP
A$890 AUD
View
Price last confirmed 29 days ago
B
Retailer 7
-
£499 GBP
€637 EUR
View
B
Retailer 8
-
£549 GBP
View
Most Expensive
B
MOH London
073C9E438 · Nov 1
£627 GBP
View
8 more retailers have this diamond
Prices start from £257 GBPSave up to £370 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
£257 GBP