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Round|Lab Grown|IGI

1.50ct I SI2 Round Lab Grown Diamond

EX • I/SI2 • IGI LG499189131

Shape and cutting style on the report: Round brilliant

Certificate IGI LG499189131

Diamond specifications and retailer prices

From £617 GBP
As of November 5, 2026
Save £2,783 GBP (82%) vs most expensive(unlock to see where)
10 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 LG499189131 or 499189131. Listed at 10 retailers as of November 3, 2026, with prices from £617 to £3,400, a £2,783 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499189131
Dimensions7.29 × 7.24 × 4.59 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.29 mm7.24 mm1.50 ctI / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499189131
Side View
Table 56.5%Crown 36°Girdle: MED-STKPavilion 41°Culet: NoneDepth 63.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £3,400 GBP|Low: £617 GBP|High: £3,445 GBP|Avg: £1,572 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 2£617 GBP
Retailer 5£912 GBP
Retailer 8£993 GBP
Retailer 10£1,021 GBP
Retailer 6£1,058 GBP
Retailer 3£1,146 GBP
Retailer 11£1,492 GBP
Retailer 7£1,677 GBP
Retailer 9£1,983 GBP
Retailer 12£2,027 GBP
Retailer 4£2,369 GBP
MOH London£3,400 GBP

14 data points across 12 retailers

10 retailers£617 GBP to £3,400 GBP

A
Cheapest Retailer
-
£617 GBP
B+
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
-
£1,677 GBP
View
B
Retailer 8
-
£1,983 GBP
View
B
Retailer 9
-
£2,027 GBP
View
Most Expensive
B
MOH London
LG499189131 · Nov 3
£3,400 GBP
View
9 more retailers have this diamond
Prices start from £617 GBPSave up to £2,783 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
£617 GBP