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Radiant|Lab Grown|IGI

1.00ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG620434179

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

Certificate IGI LG620434179

Diamond specifications and retailer prices

From $874 NZD
£382 GBP
As of November 5, 2026
1 retailer carries this diamond
Only listing: $874 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 1ct lab-grown radiant diamond

This 1ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620434179 or 620434179. Listed at a single retailer as of November 5, 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

1.00
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.8°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620434179
Dimensions7.13 × 4.96 × 3.36 mm
L/W Ratio1.44
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
7.13 mm4.96 mm1.00 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620434179
Side View
Table 65.0%Crown 46.8°Girdle: MediumPavilion 35.4°Culet: NoneDepth 67.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: $642 NZD|Low: $480 NZD|High: $1,984 NZD|Avg: $941 NZD|-7.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
March 23, 2026
Retailer 2$480 NZD
Retailer 1$642 NZD
Retailer 4$952 NZD
Retailer 3$1,533 NZD

35 data points across 4 retailers

1 retailer

B
Diamond Quarter
1.0SI1DLG796C76N · Nov 5
$874 NZD
£382 GBP
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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
1.00ct Radiant
$874 NZD