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Asscher|Lab Grown|IGI

1.58ct E SI1 Asscher Lab Grown Diamond

EX • E/SI1 • IGI LG578313137

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG578313137

Diamond specifications and retailer prices

From $1,410 NZD
£623 GBP
As of October 29, 2026
1 retailer carries this diamond
Only listing: $1,410 NZD at Diamond Quarter
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Diamond Quarter

About this 1.58ct lab-grown asscher diamond

This 1.58ct lab-grown asscher sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG578313137 or 578313137. Listed at a single retailer as of October 29, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG578313137
Dimensions6.39 × 6.33 × 4.22 mm
L/W Ratio1.01
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.39 mm6.33 mm1.58 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG578313137
Side View
Table 64.0%Crown 37.4°Girdle: MediumPavilion 39.5°Culet: NoneDepth 66.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 29
Current: $1,410 NZD|Low: $1,410 NZD|High: $2,671 NZD|Avg: $2,461 NZD
Diamond Quarter
Retailer 2
September 26, 2026
Diamond Quarter$1,410 NZD
Retailer 2$2,671 NZD

5 data points across 2 retailers

1 retailer

B
Diamond Quarter
1.58SI1ELG378C1CN · Oct 29
$1,410 NZD
£623 GBP
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B
1.58ct Asscher
$1,410 NZD