CaratHunter
Plans
Cushion|Lab Grown|IGI

1.02ct E SI1 Cushion Lab Grown Diamond

VG • E/SI1 • IGI LG400942192

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

Certificate IGI LG400942192

Diamond specifications and retailer prices

From £578 GBP
As of November 6, 2026
Save £395 GBP (41%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £973 GBP at Loose Grown Diamond · As of November 6, 2026
View at Loose Grown Diamond

About this 1.02ct lab-grown cushion diamond

This 1.02ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG400942192 or 400942192. Listed at 8 retailers as of November 6, 2026, with prices from £578 to £973, a £395 spread on the same certified stone. Loose Grown Diamond lists it at £973. 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

1.02
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.2°
Pavilion angle33.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG400942192
Dimensions5.79 × 5.73 × 3.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by high pressure high temperature process (HPHT) Type II
Top View
5.79 mm5.73 mm1.02 ctE / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG400942192
Side View
Table 64.5%Crown 33.2°Girdle: STK-VTKPavilion 33.8°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £973 GBP|Low: £578 GBP|High: £2,377 GBP|Avg: £976 GBP
Loose Grown Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8£578 GBP
Retailer 7£598 GBP
Retailer 6£680 GBP
Retailer 4£728 GBP
Retailer 2£824 GBP
Retailer 3£945 GBP
Loose Grown Diamond£973 GBP
Retailer 5£2,348 GBP

45 data points across 8 retailers

8 retailers£578 GBP to £973 GBP

B
Cheapest Retailer
-
£578 GBP
Final sale: no returns
Retailer 2
-
£598 GBP
View
Price last confirmed 22 days ago
B
Retailer 3
-
£680 GBP
View
B
Retailer 4
-
£728 GBP
View
B
Retailer 5
-
£824 GBP
View
B
Retailer 6
-
£945 GBP
View
Most Expensive
C
Loose Grown Diamond
400942192 · Nov 6
£973 GBP
$1,302 USD
View
6 more retailers have this diamond
Prices start from £578 GBPSave up to £395 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
1.02ct Cushion
£578 GBP