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Round|Lab Grown|IGI

1.21ct J VVS1 Round Lab Grown Diamond

ID • J/VVS1 • IGI LG549283635

Shape and cutting style on the report: Round brilliant

Certificate IGI LG549283635

Diamond specifications and retailer prices

From £295 GBP
$395 USD
As of October 30, 2026
Save £486 GBP (62%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £781 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded J colour (near-colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG549283635 or 549283635. Listed at 4 retailers as of October 29, 2026, with prices from £295 to £781, a £486 spread on the same certified stone. MOH London lists it at £781. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
J
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG549283635
Dimensions6.78 × 6.82 × 4.24 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment.
Top View
6.78 mm6.82 mm1.21 ctJ / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG549283635
Side View
Table 55.5%Crown 35.5°Girdle: MediumPavilion 40.6°Culet: NoneDepth 62.3%

Caratlytics Score

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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: £781 GBP|Low: £224 GBP|High: £896 GBP|Avg: £649 GBP|-0.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 3£295 GBP
Retailer 4£511 GBP
Retailer 2£575 GBP
Retailer 7£605 GBP
MOH London£781 GBP
Retailer 5£896 GBP
Retailer 6£896 GBP

12 data points across 7 retailers

4 retailers£295 GBP to £781 GBP

A
Cheapest Retailer
-
£295 GBP
$395 USD
B+
Retailer 2
-
£511 GBP
$685 USD
View
B+
Retailer 3
-
£575 GBP
$770 USD
View
Most Expensive
B+
MOH London
LG549283635 · Oct 29
£781 GBP
View
3 more retailers have this diamond
Prices start from £295 GBPSave up to £486 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
1.21ct Round
£295 GBP