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Round|Lab Grown|IGI

1.50ct I SI2 Round Lab Grown Diamond

ID • I/SI2 • IGI LG492122419

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492122419

Diamond specifications and retailer prices

From £624 GBP
As of November 5, 2026
Save £2,776 GBP (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,400 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492122419 or 492122419. Listed at 11 retailers as of November 3, 2026, with prices from £624 to £3,400, a £2,776 spread on the same certified stone. MOH London lists it at £3,400. 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
I
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492122419
Dimensions7.31 × 7.27 × 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
7.31 mm7.27 mm1.50 ctI / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492122419
Side View
Table 57.0%Crown 35.8°Girdle: THN-STKPavilion 40.6°Culet: NoneDepth 62.2%

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: £3,400 GBP|Low: £624 GBP|High: £3,445 GBP|Avg: £1,622 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 3£624 GBP
Retailer 4£912 GBP
Retailer 7£1,021 GBP
Retailer 5£1,058 GBP
Retailer 2£1,314 GBP
Retailer 8£1,492 GBP
Retailer 6£1,677 GBP
Retailer 9£2,027 GBP
Retailer 10£2,369 GBP
MOH London£3,400 GBP

43 data points across 10 retailers

11 retailers£624 GBP to £3,400 GBP

A
Cheapest Retailer
-
£624 GBP
A
Retailer 2
-
£912 GBP
View
B+
Retailer 3
-
£993 GBP
View
B+
Retailer 4
-
£1,021 GBP
View
Final sale: no returns
Retailer 5
-
£1,058 GBP
View
Price last confirmed 25 days ago
B+
Retailer 6
-
£1,058 GBP
View
B+
Retailer 7
-
£1,314 GBP
View
B
Retailer 8
-
£1,677 GBP
View
B
Retailer 9
-
£1,983 GBP
View
B
Retailer 10
-
£2,027 GBP
View
Most Expensive
B
MOH London
LG492122419 · Nov 3
£3,400 GBP
View
10 more retailers have this diamond
Prices start from £624 GBPSave up to £2,776 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
£624 GBP