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Round|Lab Grown|IGI

1.59ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686409

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686409

Diamond specifications and retailer prices

From $289 AUD
$203 USD
As of November 1, 2026
Save $1,389 AUD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,678 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.59ct lab-grown round diamond

This 1.59ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818686409 or 818686409. Listed at 15 retailers as of November 1, 2026, with prices from $289 to $1,678, a $1,389 spread on the same certified stone. MOH London lists it at $1,678. 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

1.59
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686409
Dimensions7.49 × 7.47 × 4.59 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.49 mm7.47 mm1.59 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686409
Side View
Table 58.0%Crown 34.9°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.4%

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: Nov 1
Current: $1,678 AUD|Low: $289 AUD|High: $1,698 AUD|Avg: $889 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 7$289 AUD
Retailer 9$359 AUD
Retailer 10$622 AUD
Retailer 4$656 AUD
Retailer 2$658 AUD
Retailer 11$708 AUD
Retailer 6$930 AUD
Retailer 5$1,032 AUD
Retailer 3$1,229 AUD
Retailer 8$1,295 AUD
MOH London$1,678 AUD

40 data points across 11 retailers

15 retailers$289 AUD to $1,678 AUD

A
Cheapest Retailer
-
$289 AUD
$203 USD
A
Retailer 2
-
$336 AUD
$236 USD
View
A
Retailer 3
-
$359 AUD
$252 USD
View
A
Retailer 4
-
$359 AUD
$252 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
$622 AUD
$437 USD
View
A
Retailer 6
-
$656 AUD
€439 EUR
View
A
Retailer 7
-
$658 AUD
£364 GBP
View
A
Retailer 8
-
$708 AUD
$497 USD
View
B+
Retailer 9
-
$930 AUD
$653 USD
View
B+
Retailer 10
-
$1,018 AUD
$715 USD
View
Retailer 11
-
$1,032 AUD
$725 USD
View
Price last confirmed 14 days ago
B
Retailer 12
-
$1,153 AUD
$810 USD
View
B
Retailer 13
-
$1,229 AUD
$864 USD
View
B
Retailer 14
-
$1,295 AUD
$910 USD
View
Most Expensive
B
MOH London
LG818686409 · Nov 1
$1,678 AUD
£928 GBP
View
14 more retailers have this diamond
Prices start from $289 AUDSave up to $1,389 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
1.59ct Round
$289 AUD