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Cushion|Lab Grown|IGI

0.90ct I SI1 Cushion Lab Grown Diamond

VG • I/SI1 • IGI LG418020653

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

Certificate IGI LG418020653

Diamond specifications and retailer prices

From £454 GBP
$608 USD
As of October 30, 2026
Save £359 GBP (44%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £812 GBP at Diamond Exchange Canada · As of October 30, 2026
View at Diamond Exchange Canada

About this 0.9ct lab-grown cushion diamond

This 0.9ct lab-grown cushion sits in the just-under-one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG418020653 or 418020653. Listed at 2 retailers as of October 30, 2026, with prices from £454 to £812, a £359 spread on the same certified stone. Diamond Exchange Canada lists it at £812. 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

0.90
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle39.2°
Pavilion angle31.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG418020653
Dimensions5.78 × 5.60 × 3.37 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
blue nuance
Top View
5.78 mm5.60 mm0.90 ctI / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI LG418020653
Side View
Table 56.5%Crown 39.2°Girdle: STK-VTKPavilion 31.8°Culet: NoneDepth 60.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 30
Current: £812 GBP|Low: £179 GBP|High: £1,207 GBP|Avg: £758 GBP|-4.7%
Diamond Exchange Canada
Retailer 2
Retailer 3
Retailer 4
September 30, 2026
Retailer 4£364 GBP
Retailer 2£454 GBP
Diamond Exchange Canada£812 GBP
Retailer 3£1,195 GBP

41 data points across 4 retailers

2 retailers£454 GBP to £812 GBP

B+
Cheapest Retailer
-
£454 GBP
$608 USD
Most Expensive
B+
Diamond Exchange Canada
1867369673 · Oct 30
£812 GBP
CA$1,512 CAD
View
1 more retailer has this diamond
Prices start from £454 GBPSave up to £359 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.

B+
0.90ct Cushion
£454 GBP