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Round|Lab Grown|IGI

1.01ct J SI1 Round Lab Grown Diamond

ID • J/SI1 • IGI LG455035513

Shape and cutting style on the report: Round brilliant

Certificate IGI LG455035513

Diamond specifications and retailer prices

From £433 GBP
$580 USD
As of October 30, 2026
Save £2,350 GBP (84%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,783 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.01ct lab-grown round diamond

This 1.01ct lab-grown round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG455035513 or 455035513. Listed at 13 retailers as of October 29, 2026, with prices from £433 to £2,783, a £2,350 spread on the same certified stone. MOH London lists it at £2,783. 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

1.01
Carat
J
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG455035513
Dimensions6.39 × 6.42 × 4.01 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
6.39 mm6.42 mm1.01 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG455035513
Side View
Table 57.0%Crown 34.1°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 62.5%

Caratlytics Score

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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: Oct 30
Current: £2,783 GBP|Low: £433 GBP|High: £2,806 GBP|Avg: £1,187 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 2£433 GBP
Retailer 9£704 GBP
Retailer 5£766 GBP
Retailer 4£788 GBP
Retailer 10£816 GBP
Retailer 12£816 GBP
Retailer 6£945 GBP
Retailer 13£1,049 GBP
Retailer 11£1,307 GBP
Retailer 7£1,404 GBP
Retailer 8£1,759 GBP
Retailer 3£2,295 GBP
MOH London£2,783 GBP

43 data points across 13 retailers

13 retailers£433 GBP to £2,783 GBP

A
Cheapest Retailer
-
£433 GBP
$580 USD
B+
Retailer 2
-
£704 GBP
$943 USD
View
B+
Retailer 3
-
£766 GBP
$1,026 USD
View
B+
Retailer 4
-
£788 GBP
$1,056 USD
View
Final sale: no returns
Retailer 5
-
£816 GBP
$1,094 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
£816 GBP
$1,094 USD
View
B+
Retailer 7
-
£945 GBP
View
B+
Retailer 8
-
£948 GBP
$1,270 USD
View
B
Retailer 9
-
£1,307 GBP
$1,751 USD
View
B
Retailer 10
-
£1,404 GBP
€1,791 EUR
View
B
Retailer 11
-
£1,759 GBP
$2,357 USD
View
B
Retailer 12
-
£2,295 GBP
$3,075 USD
View
Most Expensive
B
MOH London
LG455035513 · Oct 29
£2,783 GBP
View
12 more retailers have this diamond
Prices start from £433 GBPSave up to £2,350 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
1.01ct Round
£433 GBP