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Round|Lab Grown|IGI

1.83ct J SI2 Round Lab Grown Diamond

EX • J/SI2 • IGI LG436074660

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436074660

Diamond specifications and retailer prices

From £769 GBP
$1,030 USD
As of October 30, 2026
Save £1,296 GBP (63%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,558 GBP at MOH London · As of October 21, 2026
View at MOH London

About this 1.83ct lab-grown round diamond

This 1.83ct 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 LG436074660 or 436074660. Listed at 10 retailers as of October 27, 2026, with a 169% 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

1.83
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.7°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436074660
Dimensions7.84 × 7.90 × 4.78 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.84 mm7.90 mm1.83 ctJ / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436074660
Side View
Table 58.0%Crown 31.7°GirdlePavilion 40.9°Culet: NoneDepth 60.7%

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 30
Current: £3,558 GBP|Low: £769 GBP|High: £3,582 GBP|Avg: £1,867 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 2£769 GBP
Retailer 4£1,064 GBP
Retailer 6£1,532 GBP
Retailer 3£1,744 GBP
Retailer 5£2,053 GBP
Retailer 7£2,464 GBP
MOH London£3,558 GBP

10 data points across 7 retailers

10 retailers£769 GBP to £2,065 GBP

A
Cheapest Retailer
-
£769 GBP
$1,030 USD
B+
Retailer 2
-
£950 GBP
$1,273 USD
View
B+
Retailer 3
-
£1,034 GBP
$1,385 USD
View
B+
Retailer 4
-
£1,064 GBP
$1,425 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,102 GBP
$1,476 USD
View
Retailer 6
-
£1,102 GBP
$1,476 USD
View
Price last confirmed 17 days ago
B
Retailer 7
-
£1,744 GBP
$2,337 USD
View
B
Retailer 8
-
£2,053 GBP
$2,751 USD
View
B
Retailer 9
-
£2,065 GBP
$2,767 USD
View
Most Expensive
MOH London
LG436074660 · Oct 21
£3,558 GBP
View
Price last confirmed 9 days ago
9 more retailers have this diamond
Prices start from £769 GBPSave up to £1,296 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
1.83ct Round
£769 GBP