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Cushion|Lab Grown|IGI

1.53ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG512220405

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG512220405

Diamond specifications and retailer prices

From £252 GBP
As of November 6, 2026
Save £573 GBP (69%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £825 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.53ct lab-grown cushion diamond

This 1.53ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512220405 or 512220405. Listed at 5 retailers as of November 2, 2026, with prices from £252 to £825, a £573 spread on the same certified stone. MOH London lists it at £825. 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

1.53
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512220405
Dimensions6.83 × 6.65 × 4.39 mm
L/W Ratio1.03
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
6.83 mm6.65 mm1.53 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512220405
Side View
Table 63.0%Crown 35.8°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 66.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £825 GBP|Low: £252 GBP|High: £834 GBP|Avg: £487 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 4£252 GBP
Retailer 3£304 GBP
Retailer 5£369 GBP
Retailer 2£379 GBP
Retailer 6£789 GBP
MOH London£825 GBP

36 data points across 6 retailers

5 retailers£252 GBP to £825 GBP

B+
Cheapest Retailer
-
£252 GBP
A
Retailer 2
-
£304 GBP
View
A
Retailer 3
-
£379 GBP
View
B
Retailer 4
-
£789 GBP
View
Most Expensive
B
MOH London
LG512220405 · Nov 2
£825 GBP
View
4 more retailers have this diamond
Prices start from £252 GBPSave up to £573 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
1.53ct Cushion
£252 GBP