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Radiant|Lab Grown|IGI

4.00ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG728526983

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

Certificate IGI LG728526983

Diamond specifications and retailer prices

From $3,800 USD
As of October 29, 2026
1 retailer carries this diamond
Only listing: $3,800 USD at Brilliant Earth
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 Brilliant Earth

About this 4ct lab-grown radiant diamond

This 4ct lab-grown radiant sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG728526983 or 728526983. 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

4.00
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle53.7°
Pavilion angle34.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG728526983
Dimensions11.68 × 7.77 × 4.99 mm
L/W Ratio1.50
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.68 mm7.77 mm4.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG728526983
Side View
Table 66.0%Crown 53.7°Girdle: MED-STKPavilion 34.8°Culet: NoneDepth 64.2%

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: $3,800 USD|Low: $538 USD|High: $4,070 USD|Avg: $1,509 USD|-6.6%
Brilliant Earth
Retailer 2
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Retailer 13
May 8, 2026
Retailer 2$538 USD
Retailer 3$599 USD
Retailer 4$700 USD
Retailer 9$748 USD
Retailer 6$838 USD
Retailer 7$1,016 USD
Retailer 8$1,144 USD
Retailer 12$1,377 USD
Retailer 13$1,704 USD
Retailer 10$2,029 USD
Retailer 5$3,010 USD
Retailer 11$3,058 USD
Brilliant Earth$3,800 USD

61 data points across 13 retailers

1 retailer

B
Brilliant Earth
16747511A · Oct 29
$3,800 USD
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
4.00ct Radiant
$3,800 USD