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Cushion|Lab Grown|IGI

11.45ct G VS1 Cushion Lab Grown Diamond

ID • G/VS1 • IGI LG618439643

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG618439643

Diamond specifications and retailer prices

From £1,509 GBP
As of November 1, 2026
Save £12,372 GBP (89%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £13,882 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 11.45ct lab-grown cushion diamond

This 11.45ct 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 LG618439643 or 618439643. Listed at 19 retailers as of October 31, 2026, with prices from £1,509 to £13,882, a £12,372 spread on the same certified stone. Brilliant Earth lists it at £13,882. 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

11.45
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle31.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG618439643
Dimensions12.43 × 12.29 × 7.97 mm
L/W Ratio1.01
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
12.43 mm12.29 mm11.45 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG618439643
Side View
Table 63.0%Crown 38°Girdle: THK-VTKPavilion 31.2°Culet: NoneDepth 64.8%

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: Nov 1
Current: £13,882 GBP|Low: £1,509 GBP|High: £14,307 GBP|Avg: £3,746 GBP|+10.5%
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
November 1, 2026
Retailer 9£1,509 GBP
Retailer 3£1,814 GBP
Retailer 6£1,879 GBP
Retailer 16£2,004 GBP
Retailer 7£2,271 GBP
Retailer 10£2,587 GBP
Retailer 15£2,686 GBP
Retailer 13£2,687 GBP
Retailer 11£2,836 GBP
Retailer 12£2,909 GBP
Retailer 2£3,482 GBP
Retailer 8£3,571 GBP
Retailer 14£4,482 GBP
Retailer 5£5,018 GBP
Retailer 4£5,325 GBP
Brilliant Earth£13,882 GBP

42 data points across 16 retailers

19 retailers£1,509 GBP to £13,882 GBP

A
Cheapest Retailer
-
£1,509 GBP
A
Retailer 2
-
£1,814 GBP
$2,430 USD
View
Final sale: no returns
Retailer 3
-
£1,879 GBP
$2,518 USD
View
Price last confirmed 22 days ago
A
Retailer 4
-
£2,004 GBP
$2,685 USD
View
A
Retailer 5
-
£2,271 GBP
$3,043 USD
View
A
Retailer 6
-
£2,587 GBP
View
A
Retailer 7
-
£2,686 GBP
$3,599 USD
View
A
Retailer 8
-
£2,687 GBP
$3,600 USD
View
A
Retailer 9
-
£2,836 GBP
€3,619 EUR
View
A
Retailer 10
-
£2,909 GBP
ZAR 62,979 ZAR
View
A
Retailer 11
-
£3,482 GBP
A$7,178 AUD
View
B+
Retailer 12
-
£3,571 GBP
View
B+
Retailer 13
-
£4,482 GBP
$6,005 USD
View
B+
Retailer 14
-
£4,662 GBP
$6,247 USD
View
B+
Retailer 15
-
£5,018 GBP
$6,724 USD
View
B+
Retailer 16
-
£5,325 GBP
$7,135 USD
View
B
Retailer 17
-
£5,785 GBP
$7,751 USD
View
B
Retailer 18
-
£6,570 GBP
$8,803 USD
View
Most Expensive
B
Brilliant Earth
10794074A · Oct 31
£13,882 GBP
$18,600 USD
View
18 more retailers have this diamond
Prices start from £1,509 GBPSave up to £12,372 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
11.45ct Cushion
£1,509 GBP