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Cushion|Lab Grown|IGI

5.21ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG850604944

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG850604944

Diamond specifications and retailer prices

From £1,272 GBP
$1,704 USD
As of October 29, 2026
Save £7,923 GBP (86%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £9,195 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 5.21ct lab-grown cushion diamond

This 5.21ct lab-grown cushion sits in the over five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG850604944 or 850604944. Listed at 12 retailers as of October 29, 2026, with prices from £1,272 to £9,195, a £7,923 spread on the same certified stone. Brilliant Earth lists it at £9,195. 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

5.21
Carat
D
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle36.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850604944
Dimensions13.26 × 8.80 × 6.01 mm
L/W Ratio1.51
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
13.26 mm8.80 mm5.21 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850604944
Side View
Table 48.0%Crown 34.5°Girdle: STK-THKPavilion 36.5°Culet: LargeDepth 68.3%

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 29
Current: £9,195 GBP|Low: £1,272 GBP|High: £9,195 GBP|Avg: £2,925 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 6£1,272 GBP
Retailer 9£1,444 GBP
Retailer 12£1,519 GBP
Retailer 5£1,861 GBP
Retailer 4£1,884 GBP
Retailer 8£2,117 GBP
Retailer 10£2,140 GBP
Retailer 7£2,677 GBP
Retailer 11£3,385 GBP
Retailer 2£3,852 GBP
Retailer 3£4,406 GBP
Brilliant Earth£9,195 GBP

5 data points across 12 retailers

12 retailers£1,272 GBP to £9,195 GBP

A
Cheapest Retailer
-
£1,272 GBP
$1,704 USD
Final sale: no returns
A
Retailer 2
-
£1,444 GBP
$1,935 USD
View
A
Retailer 3
-
£1,519 GBP
HK$15,900 HKD
View
A
Retailer 4
-
£1,861 GBP
View
B+
Retailer 5
-
£1,884 GBP
$2,525 USD
View
B+
Retailer 6
-
£2,117 GBP
€2,702 EUR
View
B+
Retailer 7
-
£2,140 GBP
$2,867 USD
View
B+
Retailer 8
-
£2,677 GBP
ZAR 57,953 ZAR
View
B
Retailer 9
-
£3,385 GBP
$4,535 USD
View
B
Retailer 10
-
£3,852 GBP
$5,161 USD
View
B
Retailer 11
-
£4,406 GBP
SGD 7,977 SGD
View
Most Expensive
B
Brilliant Earth
22337204A · Oct 30
£9,195 GBP
$12,320 USD
View
11 more retailers have this diamond
Prices start from £1,272 GBPSave up to £7,923 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
5.21ct Cushion
£1,272 GBP