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Round|Lab Grown|IGI

1.59ct J SI2 Round Lab Grown Diamond

EX • J/SI2 • IGI LG440010931

Shape and cutting style on the report: Round brilliant

Certificate IGI LG440010931

Diamond specifications and retailer prices

From £833 GBP
$1,109 USD
As of October 29, 2026
Save £1,127 GBP (58%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,121 GBP at MOH London · As of October 21, 2026
View at MOH London

About this 1.59ct lab-grown round diamond

This 1.59ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG440010931 or 440010931. Listed at 10 retailers as of October 28, 2026, with a 135% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.59
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440010931
Dimensions7.42 × 7.40 × 4.67 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.42 mm7.40 mm1.59 ctJ / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440010931
Side View
Table 58.5%Crown 35.4°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 63.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £3,121 GBP|Low: £665 GBP|High: £3,142 GBP|Avg: £1,459 GBP|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 18, 2026
Retailer 2£833 GBP
Retailer 4£841 GBP
Retailer 7£906 GBP
Retailer 9£933 GBP
Retailer 5£966 GBP
Retailer 11£1,386 GBP
Retailer 6£1,536 GBP
Retailer 8£1,811 GBP
Retailer 10£1,960 GBP
Retailer 3£2,161 GBP
MOH London£3,121 GBP

12 data points across 11 retailers

10 retailers£833 GBP to £1,960 GBP

A
Cheapest Retailer
-
£833 GBP
$1,109 USD
A
Retailer 2
-
£841 GBP
$1,120 USD
View
A
Retailer 3
-
£906 GBP
$1,207 USD
View
A
Retailer 4
-
£933 GBP
$1,242 USD
View
Final sale: no returns
B+
Retailer 5
-
£966 GBP
$1,287 USD
View
Retailer 6
-
£966 GBP
$1,287 USD
View
Price last confirmed 17 days ago
B
Retailer 7
-
£1,536 GBP
$2,046 USD
View
B
Retailer 8
-
£1,811 GBP
$2,412 USD
View
B
Retailer 9
-
£1,960 GBP
$2,610 USD
View
Most Expensive
MOH London
LG440010931 · Oct 21
£3,121 GBP
View
Price last confirmed 8 days ago
9 more retailers have this diamond
Prices start from £833 GBPSave up to £1,127 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
1.59ct Round
£833 GBP