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Radiant|Lab Grown|IGI

4.20ct H VS2 Radiant Lab Grown Diamond

ID • H/VS2 • IGI LG783605852

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG783605852

Diamond specifications and retailer prices

From £402 GBP
$535 USD
As of October 30, 2026
Save £3,330 GBP (89%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,732 GBP at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 4.2ct lab-grown radiant diamond

This 4.2ct lab-grown radiant sits in the three to five carat band, graded H colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG783605852 or 783605852. Listed at 15 retailers as of October 28, 2026, with prices from £402 to £3,732, a £3,330 spread on the same certified stone. Brilliant Earth lists it at £3,732. 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

4.20
Carat
H
Colour
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.9°
Pavilion angle32.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG783605852
Dimensions10.43 × 8.52 × 5.22 mm
L/W Ratio1.22
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.43 mm8.52 mm4.20 ctH / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG783605852
Side View
Table 74.0%Crown 39.9°Girdle: Slightly ThickPavilion 32.7°Culet: NoneDepth 61.3%

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 30
Current: £3,732 GBP|Low: £321 GBP|High: £3,852 GBP|Avg: £1,307 GBP|-3.1%
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 28, 2026
Retailer 11£450 GBP
Retailer 7£499 GBP
Retailer 2£601 GBP
Retailer 9£770 GBP
Retailer 10£799 GBP
Retailer 3£953 GBP
Retailer 6£1,286 GBP
Retailer 8£1,310 GBP
Retailer 12£1,453 GBP
Retailer 4£1,619 GBP
Retailer 5£2,091 GBP
Brilliant Earth£3,732 GBP

19 data points across 12 retailers

15 retailers£402 GBP to £3,732 GBP

A
Cheapest Retailer
-
£402 GBP
$535 USD
A
Retailer 2
-
£450 GBP
$599 USD
View
Final sale: no returns
A
Retailer 3
-
£450 GBP
$599 USD
View
A
Retailer 4
-
£499 GBP
$664 USD
View
Retailer 5
-
£499 GBP
$664 USD
View
Price last confirmed 13 days ago
A
Retailer 6
-
£601 GBP
$800 USD
View
B+
Retailer 7
-
£770 GBP
$1,026 USD
View
A
Retailer 8
-
£799 GBP
$1,064 USD
View
A
Retailer 9
-
£953 GBP
$1,269 USD
View
B+
Retailer 10
-
£1,286 GBP
$1,713 USD
View
B+
Retailer 11
-
£1,310 GBP
$1,745 USD
View
B+
Retailer 12
-
£1,453 GBP
View
B+
Retailer 13
-
£1,619 GBP
$2,155 USD
View
B
Retailer 14
-
£2,091 GBP
View
Most Expensive
B
Brilliant Earth
18144898A · Oct 28
£3,732 GBP
$4,970 USD
View
14 more retailers have this diamond
Prices start from £402 GBPSave up to £3,330 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
4.20ct Radiant
£402 GBP