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Cushion|Lab Grown|IGI

1.27ct F SI1 Cushion Lab Grown Diamond

GD • F/SI1 • IGI LG739583468

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

Certificate IGI LG739583468

Diamond specifications and retailer prices

From £254 GBP
As of November 6, 2026
Save £430 GBP (63%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £684 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.27ct lab-grown cushion diamond

This 1.27ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG739583468 or 739583468. Listed at 7 retailers as of November 4, 2026, with prices from £254 to £684, a £430 spread on the same certified stone. MOH London lists it at £684. 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

1.27
Carat
F
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG739583468
Dimensions6.23 × 6.06 × 4.17 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.23 mm6.06 mm1.27 ctF / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG739583468
Side View
Table 62.0%Crown 37.7°Girdle: MED-STKPavilion 38.9°Culet: NoneDepth 68.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £684 GBP|Low: £249 GBP|High: £712 GBP|Avg: £379 GBP|-2.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2£254 GBP
Retailer 7£267 GBP
Retailer 4£285 GBP
Retailer 6£329 GBP
Retailer 5£335 GBP
Retailer 3£456 GBP
MOH London£684 GBP

43 data points across 7 retailers

7 retailers£254 GBP to £684 GBP

A
Cheapest Retailer
-
£254 GBP
B+
Retailer 2
-
£267 GBP
View
B+
Retailer 3
-
£285 GBP
View
B+
Retailer 4
-
£329 GBP
View
B+
Retailer 5
-
£335 GBP
View
B+
Retailer 6
-
£456 GBP
View
Most Expensive
B
MOH London
LG739583468 · Nov 4
£684 GBP
View
6 more retailers have this diamond
Prices start from £254 GBPSave up to £430 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
1.27ct Cushion
£254 GBP