Radiant|Lab Grown|IGI

4.01ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG680550637

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

Certificate IGI LG680550637

Diamond specifications and retailer prices

From $1,620 USD
£1,276 GBP
As of October 29, 2026
2 retailers carry this diamond
Most expensive: $3,658 USD at Rare Carat
View at Rare Carat

About this 4.01ct lab-grown radiant diamond

This 4.01ct 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 LG680550637 or 680550637. 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

4.01
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.2°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG680550637
Dimensions11.52 × 7.89 × 5.07 mm
L/W Ratio1.46
Culet sizePointed
Top View
11.52 mm7.89 mm4.01 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG680550637
Side View
Table 67.0%Crown 44.2°Girdle: MediumPavilion 34.2°Culet: NoneDepth 64.3%

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: $836 USD|Low: $583 USD|High: $6,660 USD|Avg: $1,808 USD|-22.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
June 15, 2026
Retailer 9$639 USD
Retailer 7$769 USD
Retailer 1$836 USD
Retailer 6$920 USD
Retailer 4$985 USD
Retailer 5$1,088 USD
Retailer 3$1,224 USD
Retailer 2$2,009 USD
Retailer 8$6,560 USD

67 data points across 9 retailers

2 retailers

B+
Cheapest Retailer
-
$1,620 USD
£1,276 GBP
Most Expensive
Rare Carat
680550637
$3,658 USD
View
1 more retailer has this diamond
Prices start from $1,620 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+
4.01ct Radiant
$1,620 USD