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Radiant|Lab Grown|IGI

1.81ct H SI1 Radiant Lab Grown Diamond

ID • H/SI1 • IGI LG523263333

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG523263333

Diamond specifications and retailer prices

From £896 GBP
$1,200 USD
As of October 31, 2026
Save £3,384 GBP (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £4,279 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.81ct lab-grown radiant diamond

This 1.81ct lab-grown radiant sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG523263333 or 523263333. Listed at 11 retailers as of October 29, 2026, with prices from £896 to £4,279, a £3,384 spread on the same certified stone. MOH London lists it at £4,279. 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

1.81
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.6°
Pavilion angle30.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG523263333
Dimensions7.78 × 6.06 × 4.08 mm
L/W Ratio1.28
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
7.78 mm6.06 mm1.81 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG523263333
Side View
Table 64.5%Crown 45.6°Girdle: ThickPavilion 30.2°Culet: NoneDepth 67.3%

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 31
Current: £4,279 GBP|Low: £896 GBP|High: £4,314 GBP|Avg: £2,161 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 29, 2026
Retailer 7£896 GBP
Retailer 6£1,285 GBP
Retailer 11£1,398 GBP
Retailer 12£1,439 GBP
Retailer 8£1,490 GBP
Retailer 5£1,518 GBP
Retailer 13£1,616 GBP
Retailer 3£1,994 GBP
Retailer 9£2,340 GBP
Retailer 2£2,570 GBP
Retailer 10£2,794 GBP
Retailer 4£4,267 GBP
MOH London£4,279 GBP

17 data points across 13 retailers

11 retailers£896 GBP to £4,279 GBP

A
Cheapest Retailer
-
£896 GBP
$1,200 USD
A
Retailer 2
-
£1,285 GBP
$1,722 USD
View
B+
Retailer 3
-
£1,398 GBP
$1,873 USD
View
B+
Retailer 4
-
£1,439 GBP
$1,928 USD
View
Final sale: no returns
Retailer 5
-
£1,490 GBP
$1,997 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
£1,490 GBP
$1,997 USD
View
B+
Retailer 7
-
£1,616 GBP
$2,165 USD
View
B
Retailer 8
-
£2,340 GBP
$3,135 USD
View
B
Retailer 9
-
£2,570 GBP
$3,443 USD
View
B
Retailer 10
-
£2,794 GBP
$3,743 USD
View
Most Expensive
B
MOH London
LG523263333 · Oct 29
£4,279 GBP
View
10 more retailers have this diamond
Prices start from £896 GBPSave up to £3,384 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
1.81ct Radiant
£896 GBP