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Round|Lab Grown|IGI

1.81ct I SI2 Round Lab Grown Diamond

ID • I/SI2 • IGI LG436046555

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436046555

Diamond specifications and retailer prices

From $1,424 AUD
$1,000 USD
As of October 30, 2026
Save $5,573 AUD (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,997 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436046555 or 436046555. Listed at 10 retailers as of October 29, 2026, with prices from $1,424 to $6,997, a $5,573 spread on the same certified stone. MOH London lists it at $6,997. 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
I
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436046555
Dimensions7.84 × 7.81 × 4.84 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.84 mm7.81 mm1.81 ctI / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436046555
Side View
Table 55.5%Crown 32.9°Girdle: ThickPavilion 41.1°Culet: NoneDepth 61.8%

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 30
Current: $6,997 AUD|Low: $1,424 AUD|High: $7,053 AUD|Avg: $3,473 AUD|+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 30, 2026
Retailer 2$1,424 AUD
Retailer 5$2,101 AUD
Retailer 8$2,285 AUD
Retailer 10$2,352 AUD
Retailer 6$2,437 AUD
Retailer 3$2,694 AUD
Retailer 12$3,321 AUD
Retailer 7$3,842 AUD
Retailer 11$4,423 AUD
Retailer 9$4,567 AUD
Retailer 4$5,455 AUD
MOH London$6,997 AUD

14 data points across 12 retailers

10 retailers$1,424 AUD to $6,997 AUD

A
Cheapest Retailer
-
$1,424 AUD
$1,000 USD
B+
Retailer 2
-
$2,101 AUD
$1,476 USD
View
B+
Retailer 3
-
$2,285 AUD
$1,605 USD
View
B+
Retailer 4
-
$2,352 AUD
$1,652 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,437 AUD
$1,712 USD
View
Retailer 6
-
$2,437 AUD
$1,712 USD
View
Price last confirmed 18 days ago
B
Retailer 7
-
$3,842 AUD
$2,699 USD
View
B
Retailer 8
-
$4,423 AUD
$3,107 USD
View
B
Retailer 9
-
$4,567 AUD
$3,208 USD
View
Most Expensive
B
MOH London
LG436046555 · Oct 29
$6,997 AUD
£3,870 GBP
View
9 more retailers have this diamond
Prices start from $1,424 AUDSave up to $5,573 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
$1,424 AUD