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Cushion|Lab Grown|IGI

2.57ct F SI2 Cushion Lab Grown Diamond

GD • F/SI2 • IGI LG529263226

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG529263226

Diamond specifications and retailer prices

From £527 GBP
As of November 6, 2026
Save £910 GBP (63%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,437 GBP at MOH London · As of November 5, 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 F colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade and certified by IGI LG529263226 or 529263226. Listed at 8 retailers as of November 5, 2026, with prices from £527 to £1,437, a £910 spread on the same certified stone. MOH London lists it at £1,437. 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
F
Colour
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle32.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG529263226
Dimensions8.61 × 7.25 × 4.84 mm
L/W Ratio1.19
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.61 mm7.25 mm2.57 ctF / SI2
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG529263226
Side View
Table 60.5%Crown 37.8°Girdle: MED-THKPavilion 32.6°Culet: NoneDepth 66.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,437 GBP|Low: £325 GBP|High: £2,264 GBP|Avg: £880 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9£325 GBP
Retailer 5£354 GBP
Retailer 4£527 GBP
Retailer 7£553 GBP
Retailer 6£604 GBP
Retailer 2£640 GBP
Retailer 3£1,162 GBP
MOH London£1,437 GBP
Retailer 8£2,264 GBP

40 data points across 9 retailers

8 retailers£527 GBP to £1,437 GBP

Retailer 1
-
£325 GBP
Price last confirmed 63 days ago
B
Retailer 2
-
£527 GBP
View
B+
Retailer 3
-
£553 GBP
View
B+
Retailer 4
-
£604 GBP
View
B+
Retailer 5
-
£640 GBP
View
Retailer 6
-
£644 GBP
View
Price last confirmed 23 days ago
B
Retailer 7
-
£1,162 GBP
View
Most Expensive
B
MOH London
LG529263226 · Nov 5
£1,437 GBP
View
7 more retailers have this diamond
Prices start from £527 GBPSave up to £910 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.

B+
2.57ct Cushion
£527 GBP