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Cushion|Lab Grown|IGI

1.58ct G SI1 Cushion Lab Grown Diamond

ID • G/SI1 • IGI LG583324122

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG583324122

Diamond specifications and retailer prices

From $280 AUD
$197 USD
As of November 1, 2026
Save $1,214 AUD (81%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,495 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.58ct lab-grown cushion diamond

This 1.58ct 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 LG583324122 or 583324122. Listed at 9 retailers as of October 31, 2026, with prices from $280 to $1,495, a $1,214 spread on the same certified stone. Brilliant Earth lists it at $1,495. 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

1.58
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.9°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG583324122
Dimensions7.94 × 6.39 × 4.21 mm
L/W Ratio1.24
Girdle conditionFaceted
Culet sizePointed
Top View
7.94 mm6.39 mm1.58 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG583324122
Side View
Table 66.0%Crown 30.9°Girdle: THN-STKPavilion 40.5°Culet: NoneDepth 65.9%

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: Nov 1
Current: $1,495 AUD|Low: $204 AUD|High: $1,537 AUD|Avg: $753 AUD|-2.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7$280 AUD
Retailer 5$310 AUD
Retailer 3$546 AUD
Retailer 6$552 AUD
Retailer 2$552 AUD
Retailer 9$722 AUD
Retailer 8$792 AUD
Retailer 4$1,454 AUD
Brilliant Earth$1,495 AUD

36 data points across 9 retailers

9 retailers$280 AUD to $1,495 AUD

A
Cheapest Retailer
-
$280 AUD
$197 USD
Final sale: no returns
Retailer 2
-
$310 AUD
$218 USD
View
Price last confirmed 21 days ago
A
Retailer 3
-
$546 AUD
€365 EUR
View
B+
Retailer 4
-
$552 AUD
$388 USD
View
A
Retailer 5
-
$552 AUD
£306 GBP
View
A
Retailer 6
-
$722 AUD
$507 USD
View
A
Retailer 7
-
$792 AUD
$556 USD
View
Retailer 8
-
$1,454 AUD
£804 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
9857590A · Oct 31
$1,495 AUD
$1,050 USD
View
8 more retailers have this diamond
Prices start from $280 AUDSave up to $1,214 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
1.58ct Cushion
$280 AUD