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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 $1,109 USD
As of October 29, 2026
Save $1,501 USD (58%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,157 USD 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
Color
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: $4,157 USD|Low: $886 USD|High: $4,185 USD|Avg: $1,943 USD|+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$1,109 USD
Retailer 4$1,120 USD
Retailer 7$1,207 USD
Retailer 9$1,242 USD
Retailer 5$1,287 USD
Retailer 11$1,846 USD
Retailer 6$2,046 USD
Retailer 8$2,412 USD
Retailer 10$2,610 USD
Retailer 3$2,878 USD
MOH London$4,157 USD

12 data points across 11 retailers

10 retailers$1,109 USD to $2,610 USD

A
Cheapest Retailer
-
$1,109 USD
A
Retailer 2
-
$1,120 USD
View
A
Retailer 3
-
$1,207 USD
View
A
Retailer 4
-
$1,242 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,287 USD
View
B+
Retailer 6
-
$1,287 USD
View
Price last confirmed 16 days ago
B
Retailer 7
-
$2,046 USD
View
B
Retailer 8
-
$2,412 USD
View
B
Retailer 9
-
$2,610 USD
View
Most Expensive
B
MOH London
LG440010931 · Oct 21
$4,157 USD
£3,273 GBP
View
Price last confirmed 8 days ago
9 more retailers have this diamond
Prices start from $1,109 USDSave up to $1,501 USD

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
$1,109 USD