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Round|Lab Grown|IGI

1.80ct J SI1 Round Lab Grown Diamond

ID • J/SI1 • IGI LG492113524

Shape and cutting style on the report: Round brilliant

Certificate IGI LG492113524

Diamond specifications and retailer prices

From $1,438 AUD
$1,010 USD
As of October 30, 2026
Save $2,857 AUD (67%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $6,579 AUD at MOH London · As of October 19, 2026
View at MOH London

About this 1.8ct lab-grown round diamond

This 1.8ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492113524 or 492113524. Listed at 12 retailers as of October 27, 2026, with a 199% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.80
Carat
J
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492113524
Dimensions7.90 × 7.83 × 4.71 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.90 mm7.83 mm1.80 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492113524
Side View
Table 56.0%Crown 33.1°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 60.0%

Caratlytics Score

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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 30
Current: $6,579 AUD|Low: $1,438 AUD|High: $6,623 AUD|Avg: $3,058 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
Retailer 13
Retailer 14
October 30, 2026
Retailer 2$1,438 AUD
Retailer 8$1,976 AUD
Retailer 12$2,150 AUD
Retailer 11$2,212 AUD
Retailer 9$2,292 AUD
Retailer 14$2,292 AUD
Retailer 3$2,534 AUD
Retailer 6$3,005 AUD
Retailer 7$3,008 AUD
Retailer 5$3,148 AUD
Retailer 10$3,619 AUD
Retailer 4$4,158 AUD
Retailer 13$4,295 AUD
MOH London$6,579 AUD

37 data points across 14 retailers

12 retailers$1,438 AUD to $4,295 AUD

A
Cheapest Retailer
-
$1,438 AUD
$1,010 USD
B+
Retailer 2
-
$1,976 AUD
$1,388 USD
View
B+
Retailer 3
-
$2,150 AUD
$1,510 USD
View
B+
Retailer 4
-
$2,212 AUD
$1,554 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,292 AUD
$1,610 USD
View
Retailer 6
-
$2,292 AUD
$1,610 USD
View
Price last confirmed 18 days ago
B+
Retailer 7
-
$2,534 AUD
$1,780 USD
View
B+
Retailer 8
-
$3,008 AUD
£1,664 GBP
View
B
Retailer 9
-
$3,619 AUD
$2,542 USD
View
B
Retailer 10
-
$4,158 AUD
$2,921 USD
View
B
Retailer 11
-
$4,295 AUD
$3,017 USD
View
Most Expensive
MOH London
LG492113524 · Oct 19
$6,579 AUD
£3,639 GBP
View
Price last confirmed 11 days ago
11 more retailers have this diamond
Prices start from $1,438 AUDSave up to $2,857 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
1.80ct Round
$1,438 AUD