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Radiant|Lab Grown|IGI

4.00ct E SI1 Radiant Lab Grown Diamond

EX • E/SI1 • IGI LG678578996

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

Certificate IGI LG678578996

Diamond specifications and retailer prices

From $1,602 USD
£1,261 GBP
As of October 29, 2026
2 retailers carry this diamond
Most expensive: $3,649 USD at Rare Carat
View at Rare Carat

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 LG678578996 or 678578996. Listed at 2 retailers as of October 29, 2026. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46°
Pavilion angle33.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG678578996
Dimensions11.29 × 7.79 × 5.05 mm
L/W Ratio1.45
Culet sizePointed
Top View
11.29 mm7.79 mm4.00 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG678578996
Side View
Table 66.0%Crown 46°Girdle: Slightly ThickPavilion 33.5°Culet: NoneDepth 64.8%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 29
Current: $825 USD|Low: $582 USD|High: $3,016 USD|Avg: $1,063 USD|-23.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
June 15, 2026
Retailer 8$630 USD
Retailer 7$768 USD
Retailer 1$825 USD
Retailer 6$890 USD
Retailer 4$974 USD
Retailer 5$1,072 USD
Retailer 3$1,203 USD
Retailer 2$1,997 USD

70 data points across 8 retailers

2 retailers

B+
Cheapest Retailer
-
$1,602 USD
£1,261 GBP
Most Expensive
Rare Carat
678578996
$3,649 USD
View
1 more retailer has this diamond
Prices start from $1,602 USD

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
$1,602 USD