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Oval|Lab Grown|IGI

4.21ct H VS1 Oval Lab Grown Diamond

GD • H/VS1 • IGI LG595361353

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG595361353

Diamond specifications and retailer prices

From £1,718 GBP
$2,302 USD
As of October 31, 2026
Save £2,445 GBP (59%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £6,110 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 4.21ct lab-grown oval diamond

This 4.21ct lab-grown oval sits in the three to five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a standard cut grade and certified by IGI LG595361353 or 595361353. Listed at 8 retailers as of October 31, 2026, with a 142% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

4.21
Carat
H
Colour
VS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG595361353
Dimensions13.39 × 9.03 × 5.62 mm
L/W Ratio1.48
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
13.39 mm9.03 mm4.21 ctH / VS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG595361353
Side View
Table 56.0%Crown 34.8°Girdle: MediumPavilion 40.1°Culet: NoneDepth 62.2%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £6,110 GBP|Low: £1,498 GBP|High: £12,882 GBP|Avg: £4,703 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 5£1,718 GBP
Retailer 8£2,097 GBP
Retailer 3£2,365 GBP
Retailer 2£2,699 GBP
Retailer 4£3,204 GBP
Retailer 6£3,385 GBP
Retailer 9£4,163 GBP
Retailer 10£4,642 GBP
Retailer 7£5,143 GBP
MOH London£6,110 GBP
Retailer 12£8,434 GBP
Retailer 11£12,882 GBP

10 data points across 12 retailers

8 retailers£1,718 GBP to £4,163 GBP

B
Cheapest Retailer
-
£1,718 GBP
$2,302 USD
B
Retailer 2
-
£2,699 GBP
CA$5,022 CAD
View
Retailer 3
-
£3,296 GBP
$4,416 USD
View
Price last confirmed 33 days ago
C
Retailer 4
-
£3,385 GBP
$4,535 USD
View
C
Retailer 5
-
£4,163 GBP
View
Most Expensive
MOH London
LG595361353 · Oct 29
£6,110 GBP
View
Price under review
5 more retailers have this diamond
Prices start from £1,718 GBPSave up to £2,445 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
4.21ct Oval
£1,718 GBP