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Round|Lab Grown|IGI

1.56ct J SI2 Round Lab Grown Diamond

ID • J/SI2 • IGI LG499191770

Shape and cutting style on the report: Round brilliant

Certificate IGI LG499191770

Diamond specifications and retailer prices

From $1,089 USD
As of October 29, 2026
Save $3,218 USD (75%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,307 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.56ct lab-grown round diamond

This 1.56ct 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 LG499191770 or 499191770. Listed at 10 retailers as of October 29, 2026, with prices from $1,089 to $4,307, a $3,218 spread on the same certified stone. MOH London lists it at $4,307. 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

1.56
Carat
J
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG499191770
Dimensions7.52 × 7.49 × 4.54 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
7.52 mm7.49 mm1.56 ctJ / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG499191770
Side View
Table 55.0%Crown 32.9°Girdle: THN-MEDPavilion 40.2°Culet: NoneDepth 60.5%

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: Oct 29
Current: $4,307 USD|Low: $871 USD|High: $4,341 USD|Avg: $2,118 USD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 2$1,100 USD
Retailer 4$1,220 USD
Retailer 7$1,643 USD
Retailer 6$1,816 USD
Retailer 3$2,011 USD
Retailer 5$2,562 USD
Retailer 8$2,825 USD
MOH London$4,307 USD

12 data points across 8 retailers

10 retailers$1,089 USD to $4,307 USD

A
Cheapest Retailer
-
$1,089 USD
A
Retailer 2
-
$1,100 USD
View
A
Retailer 3
-
$1,185 USD
View
B+
Retailer 4
-
$1,220 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,263 USD
View
B+
Retailer 6
-
$1,263 USD
View
Price last confirmed 17 days ago
B
Retailer 7
-
$2,011 USD
View
B
Retailer 8
-
$2,368 USD
View
B
Retailer 9
-
$2,562 USD
View
Most Expensive
B
MOH London
LG499191770 · Oct 29
$4,307 USD
£3,391 GBP
View
9 more retailers have this diamond
Prices start from $1,089 USDSave up to $3,218 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
1.56ct Round
$1,089 USD