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Round|Lab Grown|IGI

1.31ct I SI2 Round Lab Grown Diamond

ID • I/SI2 • IGI LG496135573

Shape and cutting style on the report: Round brilliant

Certificate IGI LG496135573

Diamond specifications and retailer prices

From £491 GBP
As of November 5, 2026
Save £1,908 GBP (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £2,400 GBP at MOH London · As of November 3, 2026
View at MOH London

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG496135573 or 496135573. Listed at 10 retailers as of November 3, 2026, with prices from £491 to £2,400, a £1,908 spread on the same certified stone. MOH London lists it at £2,400. 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

1.31
Carat
I
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG496135573
Dimensions7.07 × 7.12 × 4.30 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
7.07 mm7.12 mm1.31 ctI / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG496135573
Side View
Table 56.0%Crown 33°Girdle: THN-MEDPavilion 40.7°Culet: NoneDepth 60.5%

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: £2,400 GBP|Low: £471 GBP|High: £2,428 GBP|Avg: £992 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 4£491 GBP
Retailer 7£549 GBP
Retailer 2£565 GBP
Retailer 5£570 GBP
Retailer 8£570 GBP
Retailer 9£921 GBP
Retailer 6£929 GBP
Retailer 10£1,274 GBP
Retailer 3£1,455 GBP
MOH London£2,400 GBP

13 data points across 10 retailers

10 retailers£491 GBP to £2,400 GBP

A
Cheapest Retailer
-
£491 GBP
A
Retailer 2
-
£534 GBP
View
A
Retailer 3
-
£549 GBP
View
Final sale: no returns
A
Retailer 4
-
£565 GBP
View
A
Retailer 5
-
£570 GBP
View
Retailer 6
-
£570 GBP
View
Price last confirmed 21 days ago
B+
Retailer 7
-
£929 GBP
View
B
Retailer 8
-
£1,455 GBP
View
B
Retailer 9
-
£1,601 GBP
View
Most Expensive
B
MOH London
LG496135573 · Nov 3
£2,400 GBP
View
9 more retailers have this diamond
Prices start from £491 GBPSave up to £1,908 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
1.31ct Round
£491 GBP