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Round|Lab Grown|IGI

1.81ct E SI2 Round Lab Grown Diamond

ID • E/SI2 • IGI LG515227591

Shape and cutting style on the report: Round brilliant

Certificate IGI LG515227591

Diamond specifications and retailer prices

From $477 AUD
$335 USD
As of October 29, 2026
Save $2,085 AUD (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,562 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 1.81ct lab-grown round diamond

This 1.81ct lab-grown round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG515227591 or 515227591. Listed at 16 retailers as of October 29, 2026, with prices from $477 to $2,562, a $2,085 spread on the same certified stone. MOH London lists it at $2,562. 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
E
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG515227591
Dimensions7.80 × 7.83 × 4.85 mm
L/W Ratio1.00
Girdle conditionFaceted
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
7.80 mm7.83 mm1.81 ctE / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG515227591
Side View
Table 57.5%Crown 35.5°Girdle: MediumPavilion 41.2°Culet: NoneDepth 62.0%

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 29
Current: $2,562 AUD|Low: $477 AUD|High: $2,562 AUD|Avg: $1,303 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
Retailer 14
Retailer 15
October 30, 2026
Retailer 12$477 AUD
Retailer 10$552 AUD
Retailer 9$591 AUD
Retailer 14$591 AUD
Retailer 6$766 AUD
Retailer 8$1,022 AUD
Retailer 11$1,079 AUD
Retailer 2$1,175 AUD
Retailer 5$1,224 AUD
Retailer 3$1,238 AUD
Retailer 7$1,305 AUD
Retailer 15$1,732 AUD
Retailer 13$2,097 AUD
Retailer 4$2,144 AUD
MOH London$2,562 AUD

14 data points across 15 retailers

16 retailers$477 AUD to $2,562 AUD

A
Cheapest Retailer
-
$477 AUD
$335 USD
A
Retailer 2
-
$552 AUD
$388 USD
View
A
Retailer 3
-
$591 AUD
$415 USD
View
A
Retailer 4
-
$591 AUD
$415 USD
View
B+
Retailer 5
-
$766 AUD
$538 USD
View
B+
Retailer 6
-
$1,022 AUD
£566 GBP
View
B+
Retailer 7
-
$1,079 AUD
$758 USD
View
B+
Retailer 8
-
$1,175 AUD
£650 GBP
View
B+
Retailer 9
-
$1,224 AUD
$860 USD
View
B
Retailer 10
-
$1,238 AUD
$870 USD
View
B+
Retailer 11
-
$1,305 AUD
$917 USD
View
B
Retailer 12
-
$1,732 AUD
$1,217 USD
View
B
Retailer 13
-
$2,097 AUD
$1,473 USD
View
B
Retailer 14
-
$2,144 AUD
$1,506 USD
View
B
Retailer 15
-
$2,192 AUD
$1,540 USD
View
Most Expensive
B
MOH London
LG515227591 · Oct 29
$2,562 AUD
£1,417 GBP
View
15 more retailers have this diamond
Prices start from $477 AUDSave up to $2,085 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 Round
$477 AUD