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Round|Lab Grown|IGI

1.50ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG804642988

Shape and cutting style on the report: Round brilliant

Certificate IGI LG804642988

Diamond specifications and retailer prices

From £149 GBP
As of November 5, 2026
Save £714 GBP (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £862 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.5ct lab-grown round diamond

This 1.5ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG804642988 or 804642988. Listed at 16 retailers as of November 2, 2026, with prices from £149 to £862, a £714 spread on the same certified stone. MOH London lists it at £862. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804642988
Dimensions7.45 × 7.38 × 4.50 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.45 mm7.38 mm1.50 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804642988
Side View
Table 58.0%Crown 33.2°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 60.7%

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: Nov 5
Current: £862 GBP|Low: £149 GBP|High: £873 GBP|Avg: £426 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7£149 GBP
Retailer 8£184 GBP
Retailer 2£312 GBP
Retailer 9£320 GBP
Retailer 5£334 GBP
Retailer 10£374 GBP
Retailer 6£520 GBP
Retailer 3£594 GBP
Retailer 4£632 GBP
MOH London£862 GBP

42 data points across 10 retailers

16 retailers£149 GBP to £862 GBP

A
Cheapest Retailer
-
£149 GBP
A
Retailer 2
-
£172 GBP
View
Retailer 3
-
£184 GBP
View
Price last confirmed 12 days ago
A
Retailer 4
-
£184 GBP
View
A
Retailer 5
-
£312 GBP
View
B+
Retailer 6
-
£320 GBP
View
A
Retailer 7
-
£334 GBP
View
A
Retailer 8
-
£335 GBP
View
B+
Retailer 9
-
£374 GBP
View
B+
Retailer 10
-
£520 GBP
View
Retailer 11
-
£535 GBP
View
Price last confirmed 19 days ago
B+
Retailer 12
-
£593 GBP
View
B
Retailer 13
-
£594 GBP
View
B
Retailer 14
-
£632 GBP
View
B
Retailer 15
-
£632 GBP
View
Most Expensive
B
MOH London
LG804642988 · Nov 2
£862 GBP
View
15 more retailers have this diamond
Prices start from £149 GBPSave up to £714 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
1.50ct Round
£149 GBP