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Cushion|Lab Grown|IGI

1.00ct E SI1 Cushion Lab Grown Diamond

GD • E/SI1 • IGI LG766659411

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

Certificate IGI LG766659411

Diamond specifications and retailer prices

From £212 GBP
$284 USD
As of October 30, 2026
Save £396 GBP (65%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £608 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1ct lab-grown cushion diamond

This 1ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG766659411 or 766659411. Listed at 8 retailers as of October 29, 2026, with prices from £212 to £608, a £396 spread on the same certified stone. MOH London lists it at £608. 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

1.00
Carat
E
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle31.9°
Pavilion angle44.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766659411
Dimensions5.57 × 5.50 × 4.04 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.57 mm5.50 mm1.00 ctE / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG766659411
Side View
Table 63.0%Crown 31.9°Girdle: MED-THKPavilion 44.9°Culet: NoneDepth 73.5%

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: Oct 30
Current: £608 GBP|Low: £209 GBP|High: £612 GBP|Avg: £318 GBP|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 8£212 GBP
Retailer 2£219 GBP
Retailer 3£227 GBP
Retailer 6£242 GBP
Retailer 4£246 GBP
Retailer 7£366 GBP
Retailer 5£457 GBP
MOH London£608 GBP

31 data points across 8 retailers

8 retailers£212 GBP to £608 GBP

B+
Cheapest Retailer
-
£212 GBP
$284 USD
A
Retailer 2
-
£219 GBP
View
B+
Retailer 3
-
£227 GBP
€290 EUR
View
B+
Retailer 4
-
£242 GBP
$324 USD
View
B+
Retailer 5
-
£246 GBP
View
Retailer 6
-
£366 GBP
$490 USD
View
Price last confirmed 31 days ago
B
Retailer 7
-
£457 GBP
$613 USD
View
Most Expensive
B
MOH London
LG766659411 · Oct 29
£608 GBP
View
7 more retailers have this diamond
Prices start from £212 GBPSave up to £396 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
1.00ct Cushion
£212 GBP