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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 $350 NZD
$197 USD
As of November 1, 2026
Save $1,513 NZD (81%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,863 NZD 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 $350 to $1,863, a $1,513 spread on the same certified stone. Brilliant Earth lists it at $1,863. 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: $1,863 NZD|Low: $254 NZD|High: $1,916 NZD|Avg: $939 NZD|-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$350 NZD
Retailer 5$387 NZD
Retailer 3$680 NZD
Retailer 6$688 NZD
Retailer 2$688 NZD
Retailer 9$900 NZD
Retailer 8$987 NZD
Retailer 4$1,812 NZD
Brilliant Earth$1,863 NZD

36 data points across 9 retailers

9 retailers$350 NZD to $1,863 NZD

A
Cheapest Retailer
-
$350 NZD
$197 USD
Final sale: no returns
Retailer 2
-
$387 NZD
$218 USD
View
Price last confirmed 21 days ago
A
Retailer 3
-
$680 NZD
€365 EUR
View
B+
Retailer 4
-
$688 NZD
$388 USD
View
A
Retailer 5
-
$688 NZD
£306 GBP
View
A
Retailer 6
-
$900 NZD
$507 USD
View
A
Retailer 7
-
$987 NZD
$556 USD
View
Retailer 8
-
$1,812 NZD
£804 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
9857590A · Oct 31
$1,863 NZD
$1,050 USD
View
8 more retailers have this diamond
Prices start from $350 NZDSave up to $1,513 NZD

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
$350 NZD