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Radiant|Lab Grown|IGI

4.08ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG687585808

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

Certificate IGI LG687585808

Diamond specifications and retailer prices

From $1,529 USD
£1,204 GBP
As of November 2, 2026
1 retailer carries this diamond
Only listing: $1,529 USD 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 4.08ct lab-grown radiant diamond

This 4.08ct lab-grown radiant sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG687585808 or 687585808. Listed at a single retailer as of November 2, 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

4.08
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.6°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG687585808
Dimensions11.27 × 7.96 × 5.31 mm
L/W Ratio1.42
Culet sizePointed
Top View
11.27 mm7.96 mm4.08 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG687585808
Side View
Table 66.0%Crown 45.6°Girdle: MediumPavilion 35.7°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: Nov 2
Current: $3,380 USD|Low: $303 USD|High: $6,580 USD|Avg: $1,404 USD|-5.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
June 29, 2026
Retailer 7$690 USD
Retailer 8$729 USD
Retailer 2$828 USD
Retailer 5$965 USD
Retailer 6$1,012 USD
Retailer 4$1,177 USD
Retailer 1$3,380 USD
Retailer 3$4,090 USD

72 data points across 8 retailers

1 retailer

B
Diamond Quarter
4.08SI1FLG086289N · Nov 2
$1,529 USD
£1,204 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
4.08ct Radiant
$1,529 USD