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Cushion|Lab Grown|IGI

1.01ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG805634045

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

Certificate IGI LG805634045

Diamond specifications and retailer prices

From £149 GBP
$199 USD
As of October 25, 2026
Save £648 GBP (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £797 GBP at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.01ct lab-grown cushion diamond

This 1.01ct 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 LG805634045 or 805634045. Listed at 15 retailers as of October 25, 2026, with prices from £149 to £797, a £648 spread on the same certified stone. Reve Diamonds lists it at £797. 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

1.01
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG805634045
Dimensions5.81 × 5.79 × 3.92 mm
L/W Ratio1.00
Girdle conditionFaceted
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
5.81 mm5.79 mm1.01 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG805634045
Side View
Table 60.0%Crown 37.4°Girdle: STK-THKPavilion 39.9°Culet: NoneDepth 67.7%

Caratlytics Score

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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 25
Current: £366 GBP|Low: £131 GBP|High: £797 GBP|Avg: £348 GBP|-14.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Reve Diamonds
October 30, 2026
Retailer 13£149 GBP
Retailer 10£149 GBP
Retailer 6£193 GBP
Retailer 4£221 GBP
Retailer 8£255 GBP
Retailer 7£262 GBP
Retailer 2£268 GBP
Retailer 9£282 GBP
Retailer 1£366 GBP
Retailer 3£385 GBP
Retailer 12£393 GBP
Retailer 5£518 GBP
Retailer 11£696 GBP
Reve Diamonds£797 GBP

34 data points across 14 retailers

15 retailers£149 GBP to £797 GBP

A
Cheapest Retailer
-
£149 GBP
$199 USD
A
Retailer 2
-
£149 GBP
$200 USD
View
Final sale: no returns
A
Retailer 3
-
£193 GBP
View
A
Retailer 4
-
£221 GBP
$296 USD
View
A
Retailer 5
-
£255 GBP
€326 EUR
View
A
Retailer 6
-
£262 GBP
View
A
Retailer 7
-
£268 GBP
$359 USD
View
A
Retailer 8
-
£282 GBP
View
B+
Retailer 9
-
£366 GBP
$490 USD
View
B+
Retailer 10
-
£385 GBP
$516 USD
View
Retailer 11
-
£391 GBP
$524 USD
View
Price last confirmed 110 days ago
B
Retailer 12
-
£393 GBP
$527 USD
View
B
Retailer 13
-
£518 GBP
$695 USD
View
B
Retailer 14
-
£696 GBP
View
Most Expensive
B
Reve Diamonds
C4CC612A1 · Oct 30
£797 GBP
$1,067 USD
View
14 more retailers have this diamond
Prices start from £149 GBPSave up to £648 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
1.01ct Cushion
£149 GBP