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Cushion|Lab Grown|IGI

11.73ct G VS2 Cushion Lab Grown Diamond

ID • G/VS2 • IGI LG620435609

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG620435609

Diamond specifications and retailer prices

From £1,439 GBP
As of October 30, 2026
Save £5,501 GBP (79%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £6,941 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 11.73ct lab-grown cushion diamond

This 11.73ct lab-grown cushion sits in the over five carat band, graded G colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG620435609 or 620435609. Listed at 16 retailers as of October 29, 2026, with prices from £1,439 to £6,941, a £5,501 spread on the same certified stone. Brilliant Earth lists it at £6,941. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

11.73
Carat
G
Colour
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle32°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620435609
Dimensions12.81 × 12.60 × 7.89 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
12.81 mm12.60 mm11.73 ctG / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620435609
Side View
Table 63.0%Crown 37.9°Girdle: STK-VTKPavilion 32°Culet: NoneDepth 62.6%

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: £6,941 GBP|Low: £1,439 GBP|High: £7,157 GBP|Avg: £3,271 GBP|-3.0%
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
October 31, 2026
Retailer 7£1,439 GBP
Retailer 14£1,725 GBP
Retailer 3£1,787 GBP
Retailer 11£1,911 GBP
Retailer 4£2,196 GBP
Retailer 2£2,459 GBP
Retailer 9£2,554 GBP
Retailer 10£2,605 GBP
Retailer 8£2,713 GBP
Retailer 5£3,389 GBP
Retailer 6£4,430 GBP
Retailer 13£4,814 GBP
Retailer 12£5,082 GBP
Brilliant Earth£6,941 GBP

42 data points across 14 retailers

16 retailers£1,439 GBP to £6,941 GBP

A
Cheapest Retailer
-
£1,439 GBP
A
Retailer 2
-
£1,725 GBP
$2,311 USD
View
Final sale: no returns
Retailer 3
-
£1,787 GBP
$2,394 USD
View
Price last confirmed 20 days ago
A
Retailer 4
-
£1,911 GBP
$2,560 USD
View
A
Retailer 5
-
£2,196 GBP
$2,942 USD
View
A
Retailer 6
-
£2,459 GBP
View
B+
Retailer 7
-
£2,554 GBP
$3,422 USD
View
A
Retailer 8
-
£2,605 GBP
$3,490 USD
View
A
Retailer 9
-
£2,713 GBP
€3,462 EUR
View
A
Retailer 10
-
£3,389 GBP
View
B+
Retailer 11
-
£4,430 GBP
$5,935 USD
View
B+
Retailer 12
-
£4,814 GBP
$6,450 USD
View
B
Retailer 13
-
£5,082 GBP
$6,809 USD
View
B
Retailer 14
-
£5,883 GBP
$7,883 USD
View
B
Retailer 15
-
£6,250 GBP
$8,375 USD
View
Most Expensive
B
Brilliant Earth
10794619A · Oct 29
£6,941 GBP
$9,300 USD
View
15 more retailers have this diamond
Prices start from £1,439 GBPSave up to £5,501 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
11.73ct Cushion
£1,439 GBP