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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 $1,708 AUD
$1,200 USD
As of October 31, 2026
Save $6,411 AUD (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $8,120 AUD at MOH London · As of November 1, 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 31, 2026, with prices from $1,708 to $8,120, a $6,411 spread on the same certified stone. MOH London lists it at $8,120. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $8,120 AUD|Low: $1,708 AUD|High: $8,228 AUD|Avg: $4,121 AUD
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
November 1, 2026
Retailer 7$1,708 AUD
Retailer 6$2,451 AUD
Retailer 11$2,666 AUD
Retailer 12$2,745 AUD
Retailer 8$2,843 AUD
Retailer 5$2,896 AUD
Retailer 13$3,082 AUD
Retailer 3$3,804 AUD
Retailer 9$4,463 AUD
Retailer 2$4,901 AUD
Retailer 10$5,329 AUD
MOH London$8,120 AUD
Retailer 4$8,139 AUD

18 data points across 13 retailers

11 retailers$1,708 AUD to $8,120 AUD

A
Cheapest Retailer
-
$1,708 AUD
$1,200 USD
B+
Retailer 2
-
$2,451 AUD
$1,722 USD
View
B+
Retailer 3
-
$2,666 AUD
$1,873 USD
View
B+
Retailer 4
-
$2,745 AUD
$1,928 USD
View
Final sale: no returns
Retailer 5
-
$2,843 AUD
$1,997 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
$2,843 AUD
$1,997 USD
View
B+
Retailer 7
-
$3,082 AUD
$2,165 USD
View
B
Retailer 8
-
$4,463 AUD
$3,135 USD
View
B
Retailer 9
-
$4,901 AUD
$3,443 USD
View
B
Retailer 10
-
$5,329 AUD
$3,743 USD
View
Most Expensive
B
MOH London
LG523263333 · Nov 1
$8,120 AUD
£4,491 GBP
View
10 more retailers have this diamond
Prices start from $1,708 AUDSave up to $6,411 AUD

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
$1,708 AUD