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Round|Lab Grown|IGI

4.20ct E VS2 Round Lab Grown Diamond

EX • E/VS2 • IGI LG733547273

Shape and cutting style on the report: Round brilliant

Certificate IGI LG733547273

Diamond specifications and retailer prices

From £430 GBP
$573 USD
As of October 29, 2026
Save £1,925 GBP (82%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £6,300 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 4.2ct lab-grown round diamond

This 4.2ct lab-grown round sits in the three to five carat band, graded E colour (colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG733547273 or 733547273. Listed at 17 retailers as of October 29, 2026, with a 447% 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

4.20
Carat
E
Colour
VS2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG733547273
Dimensions10.50 × 10.46 × 6.24 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.50 mm10.46 mm4.20 ctE / VS2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG733547273
Side View
Table 60.0%Crown 32°Girdle: THN-MEDPavilion 40.8°Culet: NoneDepth 59.5%

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 29
Current: £6,300 GBP|Low: £426 GBP|High: £6,488 GBP|Avg: £1,492 GBP|-2.9%
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
October 29, 2026
Retailer 10£430 GBP
Retailer 15£487 GBP
Retailer 9£534 GBP
Retailer 7£540 GBP
Retailer 14£638 GBP
Retailer 5£780 GBP
Retailer 16£831 GBP
Retailer 11£838 GBP
Retailer 13£895 GBP
Retailer 3£1,265 GBP
Retailer 17£1,339 GBP
Retailer 6£1,419 GBP
Retailer 2£1,556 GBP
Retailer 8£1,729 GBP
Retailer 4£1,738 GBP
Retailer 12£2,356 GBP
Brilliant Earth£6,300 GBP

42 data points across 17 retailers

17 retailers£430 GBP to £2,356 GBP

A
Cheapest Retailer
-
£430 GBP
$573 USD
A
Retailer 2
-
£487 GBP
$649 USD
View
Retailer 3
-
£534 GBP
$711 USD
View
Price last confirmed 13 days ago
A
Retailer 4
-
£540 GBP
$719 USD
View
A
Retailer 5
-
£638 GBP
$850 USD
View
A
Retailer 6
-
£780 GBP
$1,039 USD
View
B+
Retailer 7
-
£831 GBP
$1,106 USD
View
A
Retailer 8
-
£838 GBP
View
A
Retailer 9
-
£895 GBP
€1,135 EUR
View
B+
Retailer 10
-
£1,265 GBP
$1,684 USD
View
B+
Retailer 11
-
£1,339 GBP
$1,783 USD
View
B+
Retailer 12
-
£1,419 GBP
$1,890 USD
View
B+
Retailer 13
-
£1,556 GBP
View
Retailer 14
-
£1,729 GBP
$2,303 USD
View
Price last confirmed 11 days ago
B+
Retailer 15
-
£1,738 GBP
$2,314 USD
View
B
Retailer 16
-
£2,356 GBP
View
Most Expensive
Brilliant Earth
16817197A · Oct 29
£6,300 GBP
$8,390 USD
View
Price under review
16 more retailers have this diamond
Prices start from £430 GBPSave up to £1,925 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 Round
£430 GBP