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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 $1,200 USD
As of October 28, 2026
Save $4,534 USD (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,734 USD 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 28, 2026, with prices from $1,200 to $5,734, a $4,534 spread on the same certified stone. MOH London lists it at $5,734. 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
Color
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 28
Current: $5,734 USD|Low: $1,200 USD|High: $5,780 USD|Avg: $2,965 USD|+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
October 29, 2026
Retailer 6$1,200 USD
Retailer 5$1,722 USD
Retailer 10$1,928 USD
Retailer 7$1,997 USD
Retailer 4$2,034 USD
Retailer 11$2,165 USD
Retailer 12$2,672 USD
Retailer 8$3,135 USD
Retailer 2$3,443 USD
Retailer 9$3,743 USD
Retailer 3$5,718 USD
MOH London$5,734 USD

16 data points across 12 retailers

11 retailers$1,200 USD to $5,734 USD

A
Cheapest Retailer
-
$1,200 USD
A
Retailer 2
-
$1,722 USD
View
B+
Retailer 3
-
$1,873 USD
View
B+
Retailer 4
-
$1,928 USD
View
Final sale: no returns
B+
Retailer 5
-
$1,997 USD
View
Price last confirmed 16 days ago
B+
Retailer 6
-
$1,997 USD
View
B+
Retailer 7
-
$2,165 USD
View
B
Retailer 8
-
$3,135 USD
View
B
Retailer 9
-
$3,443 USD
View
B
Retailer 10
-
$3,743 USD
View
Most Expensive
B
MOH London
LG523263333 · Oct 29
$5,734 USD
£4,515 GBP
View
10 more retailers have this diamond
Prices start from $1,200 USDSave up to $4,534 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
1.81ct Radiant
$1,200 USD