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Cushion|Lab Grown|IGI

1.50ct E SI1 Cushion Lab Grown Diamond

VG • E/SI1 • IGI LG499105432

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG499105432

Diamond specifications and retailer prices

From £251 GBP
As of November 6, 2026
Save £862 GBP (77%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,113 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.5ct lab-grown cushion diamond

This 1.5ct 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 very-good cut grade and certified by IGI LG499105432 or 499105432. Listed at 12 retailers as of November 1, 2026, with prices from £251 to £1,113, a £862 spread on the same certified stone. MOH London lists it at £1,113. 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

1.50
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499105432
Dimensions6.43 × 6.36 × 4.46 mm
L/W Ratio1.01
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
6.43 mm6.36 mm1.50 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499105432
Side View
Table 64.5%Crown 33°Girdle: Very ThickPavilion 39.5°Culet: NoneDepth 70.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,113 GBP|Low: £179 GBP|High: £1,126 GBP|Avg: £526 GBP|-1.0%
MOH London
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 12£251 GBP
Retailer 10£278 GBP
Retailer 6£356 GBP
Retailer 4£362 GBP
Retailer 3£363 GBP
Retailer 7£396 GBP
Retailer 9£454 GBP
Retailer 13£471 GBP
Retailer 5£501 GBP
Retailer 2£589 GBP
Retailer 8£695 GBP
Retailer 11£1,042 GBP
MOH London£1,113 GBP

41 data points across 13 retailers

12 retailers£251 GBP to £1,113 GBP

A
Cheapest Retailer
-
£251 GBP
Final sale: no returns
A
Retailer 2
-
£278 GBP
View
A
Retailer 3
-
£356 GBP
View
B+
Retailer 4
-
£362 GBP
View
Retailer 5
-
£363 GBP
View
Price last confirmed 32 days ago
B+
Retailer 6
-
£396 GBP
View
B+
Retailer 7
-
£454 GBP
View
B+
Retailer 8
-
£471 GBP
View
B
Retailer 9
-
£589 GBP
View
B
Retailer 10
-
£695 GBP
View
Retailer 11
-
£1,042 GBP
View
Price last confirmed 31 days ago
Most Expensive
B
MOH London
LG499105432 · Nov 1
£1,113 GBP
View
11 more retailers have this diamond
Prices start from £251 GBPSave up to £862 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
1.50ct Cushion
£251 GBP