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Round|Lab Grown|IGI

1.50ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG783615018

Shape and cutting style on the report: Round brilliant

Certificate IGI LG783615018

Diamond specifications and retailer prices

From £142 GBP
As of November 5, 2026
Save £679 GBP (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £821 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 LG783615018 or 783615018. Listed at 17 retailers as of November 5, 2026, with prices from £142 to £821, a £679 spread on the same certified stone. MOH London lists it at £821. 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°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG783615018
Dimensions7.38 × 7.34 × 4.49 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.38 mm7.34 mm1.50 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG783615018
Side View
Table 61.0%Crown 34°Girdle: MediumPavilion 41.4°Culet: NoneDepth 60.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £821 GBP|Low: £142 GBP|High: £849 GBP|Avg: £364 GBP|-3.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 7£142 GBP
Retailer 3£158 GBP
Retailer 16£165 GBP
Retailer 12£176 GBP
Retailer 8£177 GBP
Retailer 4£308 GBP
Retailer 2£311 GBP
Retailer 9£316 GBP
Retailer 14£332 GBP
Retailer 15£423 GBP
Retailer 10£464 GBP
Retailer 11£509 GBP
Retailer 13£566 GBP
Retailer 5£574 GBP
Retailer 6£606 GBP
MOH London£821 GBP

28 data points across 16 retailers

17 retailers£142 GBP to £821 GBP

A
Cheapest Retailer
-
£142 GBP
A
Retailer 2
-
£158 GBP
View
Final sale: no returns
A
Retailer 3
-
£165 GBP
View
A
Retailer 4
-
£176 GBP
View
Retailer 5
-
£177 GBP
View
Price last confirmed 12 days ago
B+
Retailer 6
-
£308 GBP
View
A
Retailer 7
-
£311 GBP
View
A
Retailer 8
-
£316 GBP
View
A
Retailer 9
-
£332 GBP
View
B+
Retailer 10
-
£423 GBP
View
B+
Retailer 11
-
£464 GBP
View
B+
Retailer 12
-
£509 GBP
View
Retailer 13
-
£566 GBP
View
Price last confirmed 46 days ago
B
Retailer 14
-
£566 GBP
View
B
Retailer 15
-
£574 GBP
View
B+
Retailer 16
-
£606 GBP
View
Most Expensive
B
MOH London
LG783615018 · Nov 5
£821 GBP
View
16 more retailers have this diamond
Prices start from £142 GBPSave up to £679 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
£142 GBP