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Cushion|Lab Grown|IGI

1.20ct E VS1 Cushion Lab Grown Diamond

ID • E/VS1 • IGI LG735590998

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG735590998

Diamond specifications and retailer prices

From £283 GBP
$377 USD
As of October 28, 2026
Save £1,073 GBP (79%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,245 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

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 LG735590998 or 735590998. Listed at 14 retailers as of October 26, 2026, with a 379% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle34.3°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG735590998
Dimensions5.68 × 5.68 × 3.61 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.68 mm5.68 mm1.20 ctE / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG735590998
Side View
Table 52.0%Crown 34.3°Girdle: MED-STKPavilion 38.3°Culet: LargeDepth 63.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: £596 GBP|Low: £274 GBP|High: £2,245 GBP|Avg: £584 GBP|+2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 28, 2026
Retailer 2£274 GBP
Retailer 4£283 GBP
Retailer 9£314 GBP
Retailer 11£418 GBP
Retailer 8£428 GBP
Retailer 3£430 GBP
Retailer 1£596 GBP
Retailer 5£622 GBP
Retailer 10£639 GBP
Retailer 6£844 GBP
Retailer 7£1,356 GBP

43 data points across 11 retailers

14 retailers£283 GBP to £1,356 GBP

A
Cheapest Retailer
-
£283 GBP
$377 USD
Final sale: no returns
A
Retailer 2
-
£314 GBP
$418 USD
View
Price last confirmed 17 days ago
B+
Retailer 3
-
£418 GBP
$557 USD
View
B+
Retailer 4
-
£428 GBP
$570 USD
View
B+
Retailer 5
-
£430 GBP
$572 USD
View
B+
Retailer 6
-
£596 GBP
ZAR 12,812 ZAR
View
B
Retailer 7
-
£622 GBP
View
B
Retailer 8
-
£639 GBP
A$1,309 AUD
View
Price last confirmed 24 days ago
B
Retailer 9
-
£844 GBP
A$1,730 AUD
View
B
Retailer 10
-
£1,221 GBP
$1,625 USD
View
B
Retailer 11
-
£1,231 GBP
$1,640 USD
View
B
Retailer 12
-
£1,350 GBP
View
B
Retailer 13
-
£1,356 GBP
View
Most Expensive
B
Do Amore Diamonds
27-BC81F4C8F · Oct 29
£2,245 GBP
$2,990 USD
View
Price under review
13 more retailers have this diamond
Prices start from £283 GBPSave up to £1,073 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
£283 GBP