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Cushion|Lab Grown|IGI

1.51ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG792656934

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG792656934

Diamond specifications and retailer prices

From £312 GBP
€399 EUR
As of November 2, 2026
Save £547 GBP (64%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £859 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG792656934 or 792656934. Listed at 7 retailers as of November 2, 2026, with prices from £312 to £859, a £547 spread on the same certified stone. MOH London lists it at £859. 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

1.51
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.9°
Pavilion angle36.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG792656934
Dimensions6.71 × 6.55 × 4.13 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.71 mm6.55 mm1.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG792656934
Side View
Table 65.0%Crown 35.9°Girdle: STK-THKPavilion 36.5°Culet: NoneDepth 63.1%

Caratlytics Score

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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: Nov 2
Current: £859 GBP|Low: £297 GBP|High: £900 GBP|Avg: £437 GBP|+1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 2£312 GBP
Retailer 5£319 GBP
Retailer 3£337 GBP
Retailer 4£344 GBP
Retailer 6£371 GBP
MOH London£859 GBP

41 data points across 6 retailers

7 retailers£312 GBP to £859 GBP

A
Cheapest Retailer
-
£312 GBP
€399 EUR
B+
Retailer 2
-
£319 GBP
$428 USD
View
A
Retailer 3
-
£337 GBP
View
A
Retailer 4
-
£344 GBP
$462 USD
View
A
Retailer 5
-
£371 GBP
$498 USD
View
Retailer 6
-
£637 GBP
$855 USD
View
Most Expensive
B
MOH London
LG792656934 · Nov 2
£859 GBP
View
6 more retailers have this diamond
Prices start from £312 GBPSave up to £547 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
1.51ct Cushion
£312 GBP