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Cushion|Lab Grown|IGI

11.21ct G VS1 Cushion Lab Grown Diamond

EX • G/VS1 • IGI LG605326749

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG605326749

Diamond specifications and retailer prices

From £3,384 GBP
$4,534 USD
As of November 1, 2026
Save £10,207 GBP (75%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £13,591 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 11.21ct lab-grown cushion diamond

This 11.21ct lab-grown cushion sits in the over five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG605326749 or 605326749. Listed at 4 retailers as of October 31, 2026, with prices from £3,384 to £13,591, a £10,207 spread on the same certified stone. Brilliant Earth lists it at £13,591. 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

11.21
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG605326749
Dimensions15.10 × 12.34 × 7.82 mm
L/W Ratio1.22
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
15.10 mm12.34 mm11.21 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG605326749
Side View
Table 59.0%Crown 37.2°Girdle: MED-THKPavilion 37.5°Culet: NoneDepth 63.4%

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: Nov 1
Current: £13,591 GBP|Low: £1,273 GBP|High: £14,292 GBP|Avg: £5,140 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
Retailer 15
October 31, 2026
Retailer 7£1,273 GBP
Retailer 14£2,449 GBP
Retailer 12£2,530 GBP
Retailer 4£3,155 GBP
Retailer 13£3,384 GBP
Retailer 9£3,464 GBP
Retailer 5£3,620 GBP
Retailer 2£4,030 GBP
Retailer 6£4,208 GBP
Retailer 8£4,465 GBP
Retailer 3£5,604 GBP
Retailer 15£6,626 GBP
Retailer 10£6,888 GBP
Brilliant Earth£13,591 GBP
Retailer 11£14,292 GBP

20 data points across 15 retailers

4 retailers£3,384 GBP to £13,591 GBP

A
Cheapest Retailer
-
£3,384 GBP
$4,534 USD
B+
Retailer 2
-
£4,030 GBP
€5,143 EUR
View
B
Retailer 3
-
£6,626 GBP
$8,878 USD
View
Most Expensive
B
Brilliant Earth
18094760A · Oct 31
£13,591 GBP
$18,210 USD
View
3 more retailers have this diamond
Prices start from £3,384 GBPSave up to £10,207 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
11.21ct Cushion
£3,384 GBP