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Cushion|Natural|GIA

1.31ct E SI1 Cushion Natural Diamond

VG • E/SI1 • GIA 2558438430

Certificate GIA 2558438430

Diamond specifications and retailer prices

From £2,704 GBP
As of November 6, 2026
Save £986 GBP (27%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,690 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 2558438430. Listed at 7 retailers as of October 31, 2026, with prices from £2,704 to £3,690, a £986 spread on the same certified stone. Blue Nile lists it at £3,690. 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
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2558438430
Dimensions8.15 × 5.49 × 3.59 mm
L/W Ratio1.48
Top View
8.15 mm5.49 mm1.31 ctE / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558438430
Side View
Table 66.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 65.4%

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: £3,690 GBP|Low: £2,678 GBP|High: £3,702 GBP|Avg: £3,144 GBP|-0.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6£2,704 GBP
Retailer 3£2,706 GBP
Retailer 2£2,718 GBP
Retailer 5£3,270 GBP
Retailer 4£3,439 GBP
Retailer 7£3,582 GBP
Blue Nile£3,690 GBP

44 data points across 7 retailers

7 retailers£2,704 GBP to £3,690 GBP

A
Cheapest Retailer
-
£2,704 GBP
Final sale: no returns
A
Retailer 2
-
£2,706 GBP
View
A
Retailer 3
-
£2,718 GBP
View
A
Retailer 4
-
£3,270 GBP
View
Retailer 5
-
£3,439 GBP
View
Price last confirmed 10 days ago
B+
Retailer 6
-
£3,582 GBP
View
Most Expensive
B+
Blue Nile
30380890 · Oct 31
£3,690 GBP
$4,939 USD
View
6 more retailers have this diamond
Prices start from £2,704 GBPSave up to £986 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
£2,704 GBP