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1.43ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG499189128

Shape and cutting style on the report: Round brilliant

Certificate IGI LG499189128

Diamond specifications and retailer prices

From £535 GBP
As of November 5, 2026
Save £2,188 GBP (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,723 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.43ct lab-grown round diamond

This 1.43ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG499189128 or 499189128. Listed at 11 retailers as of November 5, 2026, with prices from £535 to £2,723, a £2,188 spread on the same certified stone. MOH London lists it at £2,723. 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

1.43
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499189128
Dimensions7.22 × 7.25 × 4.47 mm
L/W Ratio1.00
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
7.22 mm7.25 mm1.43 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499189128
Side View
Table 54.5%Crown 34.9°GirdlePavilion 40.3°Culet: NoneDepth 61.8%

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: £2,723 GBP|Low: £535 GBP|High: £2,768 GBP|Avg: £1,159 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 4£535 GBP
Retailer 3£694 GBP
Retailer 7£777 GBP
Retailer 5£805 GBP
Retailer 8£805 GBP
Retailer 9£936 GBP
Retailer 10£1,184 GBP
Retailer 6£1,289 GBP
Retailer 2£1,791 GBP
MOH London£2,723 GBP

15 data points across 10 retailers

11 retailers£535 GBP to £2,723 GBP

A
Cheapest Retailer
-
£535 GBP
B+
Retailer 2
-
£694 GBP
View
B+
Retailer 3
-
£756 GBP
View
B+
Retailer 4
-
£777 GBP
View
Final sale: no returns
Retailer 5
-
£805 GBP
View
Price last confirmed 25 days ago
B+
Retailer 6
-
£805 GBP
View
B+
Retailer 7
-
£936 GBP
View
B
Retailer 8
-
£1,289 GBP
View
B
Retailer 9
-
£1,791 GBP
View
B
Retailer 10
-
£2,264 GBP
View
Most Expensive
B
MOH London
LG499189128 · Nov 5
£2,723 GBP
View
10 more retailers have this diamond
Prices start from £535 GBPSave up to £2,188 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
1.43ct Round
£535 GBP