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Round|Lab Grown|IGI

1.35ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG451056613

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056613

Diamond specifications and retailer prices

From £475 GBP
As of November 5, 2026
Save £1,841 GBP (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,316 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.35ct lab-grown round diamond

This 1.35ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451056613 or 451056613. Listed at 11 retailers as of November 5, 2026, with prices from £475 to £2,316, a £1,841 spread on the same certified stone. MOH London lists it at £2,316. 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

1.35
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.8°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056613
Dimensions7.21 × 7.25 × 4.28 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.21 mm7.25 mm1.35 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056613
Side View
Table 56.0%Crown 31.8°Girdle: THN-MEDPavilion 40.3°Culet: NoneDepth 59.2%

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: £2,316 GBP|Low: £456 GBP|High: £2,350 GBP|Avg: £1,009 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 5£475 GBP
Retailer 8£531 GBP
Retailer 6£551 GBP
Retailer 2£572 GBP
Retailer 3£684 GBP
Retailer 9£898 GBP
Retailer 7£901 GBP
Retailer 4£1,407 GBP
Retailer 10£1,577 GBP
MOH London£2,316 GBP

17 data points across 10 retailers

11 retailers£475 GBP to £2,316 GBP

A
Cheapest Retailer
-
£475 GBP
A
Retailer 2
-
£517 GBP
View
B+
Retailer 3
-
£531 GBP
View
Final sale: no returns
B+
Retailer 4
-
£551 GBP
View
Retailer 5
-
£551 GBP
View
Price last confirmed 21 days ago
B+
Retailer 6
-
£572 GBP
View
B+
Retailer 7
-
£684 GBP
View
B
Retailer 8
-
£901 GBP
View
B
Retailer 9
-
£1,407 GBP
View
B
Retailer 10
-
£1,549 GBP
View
Most Expensive
B
MOH London
LG451056613 · Nov 5
£2,316 GBP
View
10 more retailers have this diamond
Prices start from £475 GBPSave up to £1,841 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
1.35ct Round
£475 GBP