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Radiant|Lab Grown|IGI

1.59ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG640403850

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG640403850

Diamond specifications and retailer prices

From $1,176 NZD
£520 GBP
As of October 28, 2026
1 retailer carries this diamond
Only listing: $1,176 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 1.59ct lab-grown radiant diamond

This 1.59ct lab-grown radiant 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 LG640403850 or 640403850. Listed at a single retailer as of October 28, 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

1.59
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.1°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG640403850
Dimensions8.13 × 5.70 × 3.91 mm
L/W Ratio1.43
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.13 mm5.70 mm1.59 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG640403850
Side View
Table 65.0%Crown 44.1°Girdle: Slightly ThickPavilion 35.1°Culet: NoneDepth 68.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 28
Current: $3,276 NZD|Low: $3,276 NZD|High: $3,276 NZD|Avg: $3,276 NZD
November 27, 2025
Retailer 1$3,276 NZD

1 data point across 1 retailer

1 retailer

B
Diamond Quarter
1.59SI1ELG50A4F6N · Oct 28
$1,176 NZD
£520 GBP
View

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.

B
1.59ct Radiant
$1,176 NZD