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Heart|Lab Grown|IGI

1.50ct E SI1 Heart Lab Grown Diamond

ID • E/SI1 • IGI LG837669781

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG837669781

Diamond specifications and retailer prices

From £343 GBP
As of November 6, 2026
Save £459 GBP (57%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £802 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.5ct lab-grown heart diamond

This 1.5ct lab-grown heart sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG837669781 or 837669781. Listed at 4 retailers as of November 1, 2026, with prices from £343 to £802, a £459 spread on the same certified stone. MOH London lists it at £802. 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

1.50
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.3°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837669781
Dimensions7.92 × 6.93 × 4.75 mm
L/W Ratio1.14
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.92 mm6.93 mm1.50 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837669781
Side View
Table 62.0%Crown 38.3°Girdle: MediumPavilion 40.4°CuletDepth 60.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: £802 GBP|Low: £343 GBP|High: £807 GBP|Avg: £576 GBP|-0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 3, 2026
Retailer 4£343 GBP
Retailer 3£542 GBP
Retailer 2£799 GBP
MOH London£802 GBP

9 data points across 4 retailers

4 retailers£343 GBP to £802 GBP

B+
Cheapest Retailer
-
£343 GBP
B
Retailer 2
-
£542 GBP
View
B
Retailer 3
-
£799 GBP
View
Most Expensive
B
MOH London
LG837669781 · Nov 1
£802 GBP
View
3 more retailers have this diamond
Prices start from £343 GBPSave up to £459 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+
1.50ct Heart
£343 GBP