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Round|Lab Grown|IGI

1.50ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG492136639

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492136639

Diamond specifications and retailer prices

From £884 GBP
As of November 5, 2026
Save £3,029 GBP (77%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,913 GBP at MOH London · As of November 3, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492136639 or 492136639. Listed at 11 retailers as of November 3, 2026, with prices from £884 to £3,913, a £3,029 spread on the same certified stone. MOH London lists it at £3,913. 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
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492136639
Dimensions7.34 × 7.29 × 4.54 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.34 mm7.29 mm1.50 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492136639
Side View
Table 57.5%Crown 35.8°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 62.1%

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: £3,913 GBP|Low: £884 GBP|High: £3,966 GBP|Avg: £1,827 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2£884 GBP
Retailer 4£1,181 GBP
Retailer 7£1,323 GBP
Retailer 5£1,370 GBP
Retailer 10£1,430 GBP
Retailer 8£1,497 GBP
Retailer 9£1,841 GBP
Retailer 6£2,156 GBP
Retailer 3£2,423 GBP
MOH London£3,913 GBP

16 data points across 10 retailers

11 retailers£884 GBP to £3,913 GBP

A
Cheapest Retailer
-
£884 GBP
B+
Retailer 2
-
£1,181 GBP
View
B+
Retailer 3
-
£1,285 GBP
View
B+
Retailer 4
-
£1,323 GBP
View
Final sale: no returns
B
Retailer 5
-
£1,370 GBP
View
Retailer 6
-
£1,370 GBP
View
Price last confirmed 25 days ago
B+
Retailer 7
-
£1,497 GBP
View
B
Retailer 8
-
£2,156 GBP
View
B
Retailer 9
-
£2,423 GBP
View
B
Retailer 10
-
£2,569 GBP
View
Most Expensive
B
MOH London
LG492136639 · Nov 3
£3,913 GBP
View
10 more retailers have this diamond
Prices start from £884 GBPSave up to £3,029 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
£884 GBP