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Cushion|Lab Grown|IGI

1.09ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG847642187

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

Certificate IGI LG847642187

Diamond specifications and retailer prices

From £121 GBP
As of November 6, 2026
Save £118 GBP (49%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £239 GBP at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 1.09ct lab-grown cushion diamond

This 1.09ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG847642187 or 847642187. Listed at 2 retailers as of November 6, 2026, with prices from £121 to £239, a £118 spread on the same certified stone. 77 Diamonds lists it at £239. 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

1.09
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG847642187
Dimensions6.04 × 5.91 × 4.04 mm
L/W Ratio1.02
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.04 mm5.91 mm1.09 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG847642187
Side View
Table 61.0%Crown 33.9°Girdle: MED-THKPavilion 40.3°Culet: NoneDepth 68.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £239 GBP|Low: £121 GBP|High: £244 GBP|Avg: £199 GBP|-1.4%
77 Diamonds
Retailer 2
November 6, 2026
Retailer 2£121 GBP
77 Diamonds£239 GBP

11 data points across 2 retailers

2 retailers£121 GBP to £239 GBP

A
Cheapest Retailer
-
£121 GBP
Final sale: no returns
Most Expensive
A
77 Diamonds
CUSTVS5BQUY2T3 · Nov 6
£239 GBP
View
1 more retailer has this diamond
Prices start from £121 GBPSave up to £118 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
1.09ct Cushion
£121 GBP