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Round|Lab Grown|IGI

1.50ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG818686782

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686782

Diamond specifications and retailer prices

From £149 GBP
As of November 5, 2026
Save £711 GBP (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £860 GBP at MOH London · As of November 5, 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 LG818686782 or 818686782. Listed at 15 retailers as of November 5, 2026, with prices from £149 to £860, a £711 spread on the same certified stone. MOH London lists it at £860. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686782
Dimensions7.43 × 7.38 × 4.43 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
7.43 mm7.38 mm1.50 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686782
Side View
Table 62.0%Crown 34.1°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 59.8%

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 5
Current: £860 GBP|Low: £149 GBP|High: £873 GBP|Avg: £450 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9£149 GBP
Retailer 10£184 GBP
Retailer 8£308 GBP
Retailer 11£320 GBP
Retailer 2£326 GBP
Retailer 6£334 GBP
Retailer 7£520 GBP
Retailer 4£594 GBP
Retailer 5£632 GBP
Retailer 3£632 GBP
MOH London£860 GBP

46 data points across 11 retailers

15 retailers£149 GBP to £860 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
-
£308 GBP
View
B+
Retailer 6
-
£320 GBP
View
A
Retailer 7
-
£326 GBP
View
A
Retailer 8
-
£334 GBP
View
B+
Retailer 9
-
£335 GBP
View
B+
Retailer 10
-
£520 GBP
View
B
Retailer 11
-
£593 GBP
View
B
Retailer 12
-
£594 GBP
View
B
Retailer 13
-
£632 GBP
View
B
Retailer 14
-
£632 GBP
View
Most Expensive
B
MOH London
LG818686782 · Nov 5
£860 GBP
View
14 more retailers have this diamond
Prices start from £149 GBPSave up to £711 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