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Cushion|Lab Grown|IGI

1.20ct E VS1 Cushion Lab Grown Diamond

ID • E/VS1 • IGI LG803604001

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

Certificate IGI LG803604001

Diamond specifications and retailer prices

From £175 GBP
$234 USD
As of October 25, 2026
Save £758 GBP (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £933 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.2ct lab-grown cushion diamond

This 1.2ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG803604001 or 803604001. Listed at 15 retailers as of October 25, 2026, with prices from £175 to £933, a £758 spread on the same certified stone. Brilliant Earth lists it at £933. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
E
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG803604001
Dimensions6.24 × 6.20 × 4.10 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
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
6.24 mm6.20 mm1.20 ctE / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG803604001
Side View
Table 59.0%Crown 34.6°Girdle: THN-STKPavilion 40.2°Culet: NoneDepth 66.1%

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: £933 GBP|Low: £152 GBP|High: £933 GBP|Avg: £424 GBP|+11.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
October 30, 2026
Retailer 7£175 GBP
Retailer 10£180 GBP
Retailer 13£218 GBP
Retailer 8£265 GBP
Retailer 16£285 GBP
Retailer 11£305 GBP
Retailer 14£315 GBP
Retailer 2£319 GBP
Retailer 9£413 GBP
Retailer 6£414 GBP
Retailer 5£427 GBP
Retailer 3£478 GBP
Retailer 4£507 GBP
Retailer 15£598 GBP
Retailer 17£791 GBP
Retailer 12£861 GBP
Brilliant Earth£933 GBP

16 data points across 17 retailers

15 retailers£175 GBP to £933 GBP

A
Cheapest Retailer
-
£175 GBP
$234 USD
A
Retailer 2
-
£180 GBP
$241 USD
View
Final sale: no returns
A
Retailer 3
-
£218 GBP
View
A
Retailer 4
-
£285 GBP
€364 EUR
View
A
Retailer 5
-
£305 GBP
$408 USD
View
A
Retailer 6
-
£315 GBP
View
A
Retailer 7
-
£319 GBP
$428 USD
View
B+
Retailer 8
-
£414 GBP
$555 USD
View
Retailer 9
-
£427 GBP
A$880 AUD
View
Price last confirmed 7 days ago
B+
Retailer 10
-
£478 GBP
$640 USD
View
B+
Retailer 11
-
£507 GBP
A$1,045 AUD
View
B+
Retailer 12
-
£598 GBP
$801 USD
View
B
Retailer 13
-
£791 GBP
View
B
Retailer 14
-
£861 GBP
$1,154 USD
View
Most Expensive
B
Brilliant Earth
19740795A · Oct 29
£933 GBP
$1,250 USD
View
14 more retailers have this diamond
Prices start from £175 GBPSave up to £758 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
1.20ct Cushion
£175 GBP