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Cushion|Lab Grown|IGI

2.57ct E SI1 Cushion Lab Grown Diamond

VG • E/SI1 • IGI LG635496329

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG635496329

Diamond specifications and retailer prices

From £348 GBP
$466 USD
As of October 30, 2026
Save £1,074 GBP (76%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,422 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 2.57ct lab-grown cushion diamond

This 2.57ct lab-grown cushion sits in the two to three carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG635496329 or 635496329. Listed at 4 retailers as of October 29, 2026, with prices from £348 to £1,422, a £1,074 spread on the same certified stone. MOH London lists it at £1,422. 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

2.57
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.3°
Pavilion angle38°
OriginLab Grown
Grading LabIGI
CertificateIGI LG635496329
Dimensions8.13 × 7.77 × 4.97 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.13 mm7.77 mm2.57 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG635496329
Side View
Table 69.0%Crown 41.3°Girdle: THN-STKPavilion 38°Culet: NoneDepth 64.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,422 GBP|Low: £348 GBP|High: £1,842 GBP|Avg: £939 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 4£348 GBP
Retailer 2£608 GBP
Retailer 3£608 GBP
Retailer 7£648 GBP
Retailer 5£899 GBP
Retailer 6£1,289 GBP
MOH London£1,422 GBP
Retailer 8£1,842 GBP

9 data points across 8 retailers

4 retailers£348 GBP to £1,422 GBP

A
Cheapest Retailer
-
£348 GBP
$466 USD
Final sale: no returns
B+
Retailer 2
-
£608 GBP
$815 USD
View
B+
Retailer 3
-
£608 GBP
$815 USD
View
Most Expensive
B
MOH London
LG635496329 · Oct 29
£1,422 GBP
View
3 more retailers have this diamond
Prices start from £348 GBPSave up to £1,074 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
2.57ct Cushion
£348 GBP