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Round|Lab Grown|IGI

1.30ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG451056225

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056225

Diamond specifications and retailer prices

From £458 GBP
As of November 5, 2026
Save £2,002 GBP (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,460 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.3ct lab-grown round diamond

This 1.3ct 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 LG451056225 or 451056225. Listed at 11 retailers as of November 5, 2026, with prices from £458 to £2,460, a £2,002 spread on the same certified stone. MOH London lists it at £2,460. 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

1.30
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056225
Dimensions6.96 × 7.01 × 4.37 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.96 mm7.01 mm1.30 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056225
Side View
Table 59.0%Crown 36.4°Girdle: THN-MEDPavilion 41.6°Culet: NoneDepth 62.6%

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: £2,460 GBP|Low: £440 GBP|High: £2,500 GBP|Avg: £1,013 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 5£458 GBP
Retailer 8£513 GBP
Retailer 2£557 GBP
Retailer 6£568 GBP
Retailer 3£665 GBP
Retailer 7£870 GBP
Retailer 9£898 GBP
Retailer 4£1,410 GBP
Retailer 10£1,521 GBP
MOH London£2,460 GBP

21 data points across 10 retailers

11 retailers£458 GBP to £2,460 GBP

A
Cheapest Retailer
-
£458 GBP
B+
Retailer 2
-
£513 GBP
View
Final sale: no returns
B+
Retailer 3
-
£513 GBP
View
B+
Retailer 4
-
£557 GBP
View
B+
Retailer 5
-
£568 GBP
View
Retailer 6
-
£568 GBP
View
Price last confirmed 21 days ago
B+
Retailer 7
-
£665 GBP
View
B
Retailer 8
-
£870 GBP
View
B
Retailer 9
-
£1,410 GBP
View
B
Retailer 10
-
£1,494 GBP
View
Most Expensive
B
MOH London
LG451056225 · Nov 5
£2,460 GBP
View
10 more retailers have this diamond
Prices start from £458 GBPSave up to £2,002 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
1.30ct Round
£458 GBP