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Heart|Lab Grown|IGI

1.04ct F SI1 Heart Lab Grown Diamond

ID • F/SI1 • IGI LG818679885

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818679885

Diamond specifications and retailer prices

From £241 GBP
As of November 4, 2026
Save £423 GBP (64%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £664 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.04ct lab-grown heart diamond

This 1.04ct lab-grown heart sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818679885 or 818679885. Listed at 3 retailers as of November 4, 2026, with prices from £241 to £664, a £423 spread on the same certified stone. MOH London lists it at £664. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.04
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818679885
Dimensions6.72 × 6.57 × 4.11 mm
L/W Ratio1.02
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.72 mm6.57 mm1.04 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818679885
Side View
Table 61.0%Crown 33.7°Girdle: STK-THKPavilion 40.9°CuletDepth 61.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £664 GBP|Low: £241 GBP|High: £714 GBP|Avg: £400 GBP|-4.1%
MOH London
Retailer 2
Retailer 3
November 4, 2026
Retailer 2£241 GBP
Retailer 3£260 GBP
MOH London£664 GBP

18 data points across 3 retailers

3 retailers£241 GBP to £664 GBP

A
Cheapest Retailer
-
£241 GBP
A
Retailer 2
-
£260 GBP
View
Most Expensive
B
MOH London
LG818679885 · Nov 4
£664 GBP
View
2 more retailers have this diamond
Prices start from £241 GBPSave up to £423 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
1.04ct Heart
£241 GBP