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1.50ct H SI1 Round Lab Grown Diamond

EX • H/SI1 • IGI LG492136401

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492136401

Diamond specifications and retailer prices

From £966 GBP
As of November 5, 2026
Save £2,947 GBP (75%) 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 LG492136401 or 492136401. Listed at 11 retailers as of November 3, 2026, with prices from £966 to £3,913, a £2,947 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492136401
Dimensions7.35 × 7.28 × 4.56 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
7.35 mm7.28 mm1.50 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492136401
Side View
Table 56.5%Crown 36.4°Girdle: MediumPavilion 40.5°Culet: NoneDepth 62.4%

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: £966 GBP|High: £3,966 GBP|Avg: £2,023 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 5£966 GBP
Retailer 4£1,181 GBP
Retailer 8£1,322 GBP
Retailer 6£1,370 GBP
Retailer 3£1,430 GBP
Retailer 9£1,497 GBP
Retailer 10£1,841 GBP
Retailer 7£2,156 GBP
Retailer 2£2,423 GBP
MOH London£3,913 GBP
Retailer 11£3,922 GBP

15 data points across 11 retailers

11 retailers£966 GBP to £3,913 GBP

A
Cheapest Retailer
-
£966 GBP
B+
Retailer 2
-
£1,181 GBP
View
B+
Retailer 3
-
£1,285 GBP
View
B+
Retailer 4
-
£1,322 GBP
View
Final sale: no returns
Retailer 5
-
£1,370 GBP
View
Price last confirmed 25 days ago
B
Retailer 6
-
£1,370 GBP
View
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
LG492136401 · Nov 3
£3,913 GBP
View
10 more retailers have this diamond
Prices start from £966 GBPSave up to £2,947 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
£966 GBP