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Cushion|Lab Grown|IGI

1.59ct G SI1 Cushion Lab Grown Diamond

ID • G/SI1 • IGI LG620424322

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG620424322

Diamond specifications and retailer prices

From $377 AUD
$265 USD
As of November 1, 2026
Save $1,395 AUD (79%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,772 AUD at Michael Trio · As of November 2, 2026
View at Michael Trio

About this 1.59ct lab-grown cushion diamond

This 1.59ct lab-grown cushion 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 LG620424322 or 620424322. Listed at 6 retailers as of November 1, 2026, with prices from $377 to $1,772, a $1,395 spread on the same certified stone. Michael Trio lists it at $1,772. 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 angle34.2°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620424322
Dimensions6.92 × 6.80 × 4.58 mm
L/W Ratio1.02
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
6.92 mm6.80 mm1.59 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620424322
Side View
Table 60.0%Crown 34.2°Girdle: THN-STKPavilion 40.2°Culet: NoneDepth 67.4%

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: $1,772 AUD|Low: $377 AUD|High: $1,772 AUD|Avg: $1,011 AUD
Michael Trio
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 4$377 AUD
Retailer 5$605 AUD
Retailer 6$620 AUD
Retailer 3$1,146 AUD
Retailer 2$1,495 AUD
Michael Trio$1,772 AUD

4 data points across 6 retailers

6 retailers$377 AUD to $1,772 AUD

A
Cheapest Retailer
-
$377 AUD
$265 USD
Final sale: no returns
A
Retailer 2
-
$605 AUD
$425 USD
View
A
Retailer 3
-
$620 AUD
HK$3,400 HKD
View
B+
Retailer 4
-
$1,146 AUD
$805 USD
View
B+
Retailer 5
-
$1,495 AUD
$1,050 USD
View
Most Expensive
B
Michael Trio
3292028890 · Nov 2
$1,772 AUD
SGD 1,682 SGD
View
5 more retailers have this diamond
Prices start from $377 AUDSave up to $1,395 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 Cushion
$377 AUD