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Cushion|Lab Grown|IGI

5.21ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG837604806

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG837604806

Diamond specifications and retailer prices

From £1,221 GBP
As of October 30, 2026
Save £2,411 GBP (66%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £9,456 GBP at Brilliant Earth · As of September 28, 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 LG837604806 or 837604806. Listed at 11 retailers as of October 29, 2026, with a 197% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837604806
Dimensions12.15 × 8.89 × 5.98 mm
L/W Ratio1.37
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.15 mm8.89 mm5.21 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837604806
Side View
Table 59.0%Crown 36.4°Girdle: MED-THKPavilion 35.1°Culet: NoneDepth 67.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £3,035 GBP|Low: £1,221 GBP|High: £3,632 GBP|Avg: £2,307 GBP|-8.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 4£1,221 GBP
Retailer 11£1,246 GBP
Retailer 3£1,277 GBP
Retailer 2£1,965 GBP
Retailer 5£2,084 GBP
Retailer 6£2,285 GBP
Retailer 10£2,529 GBP
Retailer 9£3,003 GBP
Retailer 1£3,035 GBP
Retailer 8£3,226 GBP
Retailer 7£3,632 GBP

30 data points across 11 retailers

11 retailers£1,221 GBP to £3,632 GBP

A
Cheapest Retailer
-
£1,221 GBP
Retailer 2
-
£1,246 GBP
$1,669 USD
View
Price last confirmed 20 days ago
Retailer 3
-
£1,965 GBP
$2,633 USD
View
Price last confirmed 13 days ago
B+
Retailer 4
-
£2,084 GBP
$2,793 USD
View
B+
Retailer 5
-
£2,285 GBP
ZAR 49,453 ZAR
View
Retailer 6
-
£2,529 GBP
A$5,214 AUD
View
Price last confirmed 9 days ago
B+
Retailer 7
-
£3,003 GBP
View
B+
Retailer 8
-
£3,035 GBP
$4,067 USD
View
B+
Retailer 9
-
£3,226 GBP
$4,323 USD
View
B
Retailer 10
-
£3,632 GBP
View
Most Expensive
Brilliant Earth
21386786A · Sep 28
£9,456 GBP
$12,670 USD
View
Price last confirmed 32 days ago
10 more retailers have this diamond
Prices start from £1,221 GBPSave up to £2,411 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
£1,221 GBP