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Heart|Lab Grown|IGI

1.31ct F VS1 Heart Lab Grown Diamond

VG • F/VS1 • IGI LG811664150

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG811664150

Diamond specifications and retailer prices

From £288 GBP
As of November 4, 2026
Save £512 GBP (64%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £800 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.31ct lab-grown heart diamond

This 1.31ct lab-grown heart sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG811664150 or 811664150. Listed at 7 retailers as of November 4, 2026, with prices from £288 to £800, a £512 spread on the same certified stone. MOH London lists it at £800. 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

1.31
Carat
F
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle42.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811664150
Dimensions6.99 × 7.29 × 4.64 mm
L/W Ratio1.04
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.99 mm7.29 mm1.31 ctF / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811664150
Side View
Table 62.0%Crown 33.7°Girdle: MED-STKPavilion 42.4°Culet: NoneDepth 63.6%

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: Nov 4
Current: £800 GBP|Low: £287 GBP|High: £821 GBP|Avg: £459 GBP|-2.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 3£288 GBP
Retailer 7£302 GBP
Retailer 2£308 GBP
Retailer 6£369 GBP
Retailer 5£414 GBP
Retailer 4£591 GBP
MOH London£800 GBP

45 data points across 7 retailers

7 retailers£288 GBP to £800 GBP

A
Cheapest Retailer
-
£288 GBP
A
Retailer 2
-
£302 GBP
View
A
Retailer 3
-
£308 GBP
View
B+
Retailer 4
-
£369 GBP
View
B+
Retailer 5
-
£414 GBP
View
B
Retailer 6
-
£591 GBP
View
Most Expensive
B
MOH London
LG811664150 · Nov 5
£800 GBP
View
6 more retailers have this diamond
Prices start from £288 GBPSave up to £512 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
1.31ct Heart
£288 GBP