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Cushion|Lab Grown|IGI

11.79ct G VS1 Cushion Lab Grown Diamond

ID • G/VS1 • IGI LG818631890

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG818631890

Diamond specifications and retailer prices

From £5,691 GBP
As of November 2, 2026
Save £10,346 GBP (65%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £16,036 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 11.79ct lab-grown cushion diamond

This 11.79ct 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 LG818631890 or 818631890. Listed at 10 retailers as of October 31, 2026, with prices from £5,691 to £16,036, a £10,346 spread on the same certified stone. Taylor and Hart lists it at £16,036. 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

11.79
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle46.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818631890
Dimensions16.91 × 10.88 × 6.80 mm
L/W Ratio1.55
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.91 mm10.88 mm11.79 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818631890
Side View
Table 63.0%Crown 36.6°Girdle: MED-THKPavilion 46.4°Culet: LargeDepth 62.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £5,691 GBP|Low: £4,493 GBP|High: £16,036 GBP|Avg: £8,712 GBP|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Taylor and Hart
November 2, 2026
Retailer 1£5,691 GBP
Retailer 4£6,176 GBP
Retailer 8£6,347 GBP
Retailer 9£6,872 GBP
Retailer 6£6,924 GBP
Retailer 3£6,936 GBP
Retailer 5£8,438 GBP
Retailer 2£8,522 GBP
Retailer 7£13,999 GBP
Taylor and Hart£16,036 GBP

39 data points across 10 retailers

10 retailers£5,691 GBP to £16,036 GBP

B+
Cheapest Retailer
-
£5,691 GBP
B
Retailer 2
-
£6,176 GBP
$8,275 USD
View
B
Retailer 3
-
£6,347 GBP
View
B
Retailer 4
-
£6,872 GBP
$9,208 USD
View
B
Retailer 5
-
£6,924 GBP
$9,277 USD
View
B
Retailer 6
-
£6,936 GBP
ZAR 150,133 ZAR
View
B
Retailer 7
-
£8,438 GBP
$11,306 USD
View
B
Retailer 8
-
£8,522 GBP
A$17,566 AUD
View
B
Retailer 9
-
£13,999 GBP
SGD 25,348 SGD
View
Most Expensive
B
Taylor and Hart
3Y014ZP · Oct 31
£16,036 GBP
$21,487 USD
View
9 more retailers have this diamond
Prices start from £5,691 GBPSave up to £10,346 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.

B+
11.79ct Cushion
£5,691 GBP