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Cushion|Lab Grown|IGI

11.59ct G VS1 Cushion Lab Grown Diamond

ID • G/VS1 • IGI LG821678406

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG821678406

Diamond specifications and retailer prices

From £5,595 GBP
As of November 2, 2026
Save £10,232 GBP (65%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £15,827 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 11.59ct lab-grown cushion diamond

This 11.59ct 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 LG821678406 or 821678406. Listed at 10 retailers as of October 31, 2026, with prices from £5,595 to £15,827, a £10,232 spread on the same certified stone. Taylor and Hart lists it at £15,827. 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

11.59
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle43.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821678406
Dimensions16.80 × 10.80 × 6.81 mm
L/W Ratio1.56
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.80 mm10.80 mm11.59 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821678406
Side View
Table 63.0%Crown 35.1°Girdle: MED-STKPavilion 43.7°Culet: LargeDepth 63.1%

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: £5,595 GBP|Low: £4,422 GBP|High: £15,827 GBP|Avg: £8,571 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£5,595 GBP
Retailer 4£6,071 GBP
Retailer 8£6,244 GBP
Retailer 9£6,664 GBP
Retailer 6£6,811 GBP
Retailer 3£6,823 GBP
Retailer 5£8,296 GBP
Retailer 2£8,378 GBP
Retailer 7£13,765 GBP
Taylor and Hart£15,827 GBP

38 data points across 10 retailers

10 retailers£5,595 GBP to £15,827 GBP

B+
Cheapest Retailer
-
£5,595 GBP
B
Retailer 2
-
£6,071 GBP
$8,135 USD
View
B
Retailer 3
-
£6,244 GBP
View
B
Retailer 4
-
£6,664 GBP
$8,929 USD
View
B
Retailer 5
-
£6,811 GBP
$9,126 USD
View
B
Retailer 6
-
£6,823 GBP
ZAR 147,689 ZAR
View
B
Retailer 7
-
£8,296 GBP
$11,116 USD
View
B
Retailer 8
-
£8,378 GBP
A$17,270 AUD
View
B
Retailer 9
-
£13,765 GBP
SGD 24,924 SGD
View
Most Expensive
B
Taylor and Hart
XNGMGFI · Oct 31
£15,827 GBP
$21,207 USD
View
9 more retailers have this diamond
Prices start from £5,595 GBPSave up to £10,232 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+
11.59ct Cushion
£5,595 GBP