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Heart|Lab Grown|IGI

1.21ct F VVS1 Heart Lab Grown Diamond

ID • F/VVS1 • IGI LG816649122

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG816649122

Diamond specifications and retailer prices

From £382 GBP
As of November 6, 2026
Save £527 GBP (58%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £909 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.21ct lab-grown heart diamond

This 1.21ct lab-grown heart sits in the classic one-carat band, graded F colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG816649122 or 816649122. Listed at 6 retailers as of November 5, 2026, with prices from £382 to £909, a £527 spread on the same certified stone. MOH London lists it at £909. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
F
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816649122
Dimensions7.17 × 6.44 × 4.51 mm
L/W Ratio1.11
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.17 mm6.44 mm1.21 ctF / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816649122
Side View
Table 59.0%Crown 33.6°Girdle: Slightly ThickPavilion 41.3°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £909 GBP|Low: £363 GBP|High: £922 GBP|Avg: £564 GBP|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 3£382 GBP
Retailer 2£426 GBP
Retailer 5£437 GBP
Retailer 4£461 GBP
Retailer 6£770 GBP
MOH London£909 GBP

42 data points across 6 retailers

6 retailers£382 GBP to £909 GBP

B+
Cheapest Retailer
-
£382 GBP
B+
Retailer 2
-
£426 GBP
View
B+
Retailer 3
-
£437 GBP
View
B+
Retailer 4
-
£461 GBP
View
B
Retailer 5
-
£770 GBP
View
Most Expensive
B
MOH London
LG816649122 · Nov 5
£909 GBP
View
5 more retailers have this diamond
Prices start from £382 GBPSave up to £527 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+
1.21ct Heart
£382 GBP