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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 £818 GBP
$1,089 USD
As of October 29, 2026
Save £2,416 GBP (75%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,234 GBP 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 £818 to £3,234, a £2,416 spread on the same certified stone. MOH London lists it at £3,234. 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
Colour
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

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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 29
Current: £3,234 GBP|Low: £826 GBP|High: £3,260 GBP|Avg: £1,608 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 2£826 GBP
Retailer 4£916 GBP
Retailer 7£1,234 GBP
Retailer 6£1,364 GBP
Retailer 3£1,510 GBP
Retailer 5£1,924 GBP
Retailer 8£2,121 GBP
MOH London£3,234 GBP

11 data points across 8 retailers

10 retailers£818 GBP to £3,234 GBP

A
Cheapest Retailer
-
£818 GBP
$1,089 USD
A
Retailer 2
-
£826 GBP
$1,100 USD
View
A
Retailer 3
-
£890 GBP
$1,185 USD
View
B+
Retailer 4
-
£916 GBP
$1,220 USD
View
Final sale: no returns
B+
Retailer 5
-
£948 GBP
$1,263 USD
View
Retailer 6
-
£948 GBP
$1,263 USD
View
Price last confirmed 17 days ago
B
Retailer 7
-
£1,510 GBP
$2,011 USD
View
B
Retailer 8
-
£1,778 GBP
$2,368 USD
View
B
Retailer 9
-
£1,924 GBP
$2,562 USD
View
Most Expensive
B
MOH London
LG499191770 · Oct 29
£3,234 GBP
View
9 more retailers have this diamond
Prices start from £818 GBPSave up to £2,416 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
1.56ct Round
£818 GBP