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Cushion|Natural|GIA

1.31ct E SI1 Cushion Natural Diamond

GD • E/SI1 • GIA 2536811591

Certificate GIA 2536811591

Diamond specifications and retailer prices

From £2,180 GBP
As of November 6, 2026
Save £1,918 GBP (47%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £4,098 GBP at With Clarity · As of November 6, 2026
View at With Clarity

About this 1.31ct natural cushion diamond

This 1.31ct natural cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2536811591. Listed at 8 retailers as of November 6, 2026, with prices from £2,180 to £4,098, a £1,918 spread on the same certified stone. With Clarity lists it at £4,098. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.31
Carat
E
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2536811591
Dimensions6.59 × 6.20 × 4.25 mm
L/W Ratio1.06
Top View
6.59 mm6.20 mm1.31 ctE / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2536811591
Side View
Table 62.0%CrownGirdle: ThickPavilionCulet: NoneDepth 68.5%

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: £2,598 GBP|Low: £2,161 GBP|High: £4,098 GBP|Avg: £2,958 GBP|+0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
With Clarity
November 5, 2026
Retailer 2£2,180 GBP
Retailer 7£2,597 GBP
Retailer 1£2,598 GBP
Retailer 3£2,717 GBP
Retailer 6£2,745 GBP
Retailer 4£2,996 GBP
Retailer 5£3,098 GBP
Retailer 8£3,266 GBP
Retailer 9£3,307 GBP
With Clarity£4,098 GBP

10 data points across 10 retailers

8 retailers£2,180 GBP to £4,098 GBP

A
Cheapest Retailer
-
£2,180 GBP
A
Retailer 2
-
£2,597 GBP
View
A
Retailer 3
-
£2,598 GBP
View
A
Retailer 4
-
£2,717 GBP
View
Final sale: no returns
B+
Retailer 5
-
£2,745 GBP
View
B+
Retailer 6
-
£2,996 GBP
View
B+
Retailer 7
-
£3,098 GBP
View
Most Expensive
B
With Clarity
2536811591 · Nov 6
£4,098 GBP
$5,485 USD
View
7 more retailers have this diamond
Prices start from £2,180 GBPSave up to £1,918 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
1.31ct Cushion
£2,180 GBP