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Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG537240878

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG537240878

Diamond specifications and retailer prices

From £155 GBP
As of November 6, 2026
Save £703 GBP (82%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £858 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG537240878 or 537240878. Listed at 16 retailers as of November 6, 2026, with prices from £155 to £858, a £703 spread on the same certified stone. Reve Diamonds lists it at £858. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle31.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG537240878
Dimensions7.72 × 5.99 × 3.75 mm
L/W Ratio1.29
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
7.72 mm5.99 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG537240878
Side View
Table 60.5%Crown 37.4°Girdle: MED-STKPavilion 31.3°Culet: NoneDepth 62.6%

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: Nov 6
Current: £395 GBP|Low: £155 GBP|High: £814 GBP|Avg: £388 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 7, 2026
Retailer 4£155 GBP
Retailer 2£172 GBP
Retailer 13£232 GBP
Retailer 9£283 GBP
Retailer 8£307 GBP
Retailer 5£342 GBP
Retailer 11£377 GBP
Retailer 1£395 GBP
Retailer 10£409 GBP
Retailer 3£421 GBP
Retailer 6£635 GBP
Retailer 12£680 GBP
Retailer 7£799 GBP

44 data points across 13 retailers

16 retailers£155 GBP to £858 GBP

A
Cheapest Retailer
-
£155 GBP
Final sale: no returns
A
Retailer 2
-
£172 GBP
View
B+
Retailer 3
-
£232 GBP
View
A
Retailer 4
-
£283 GBP
View
A
Retailer 5
-
£307 GBP
View
A
Retailer 6
-
£335 GBP
View
A
Retailer 7
-
£342 GBP
View
A
Retailer 8
-
£377 GBP
View
A
Retailer 9
-
£395 GBP
View
A
Retailer 10
-
£409 GBP
View
B+
Retailer 11
-
£421 GBP
View
B
Retailer 12
-
£593 GBP
View
B+
Retailer 13
-
£635 GBP
View
B
Retailer 14
-
£680 GBP
View
B
Retailer 15
-
£799 GBP
View
Most Expensive
B
Reve Diamonds
DD937C927 · Nov 6
£858 GBP
$1,148 USD
View
15 more retailers have this diamond
Prices start from £155 GBPSave up to £703 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
£155 GBP