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Radiant|Lab Grown|IGI

4.02ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG816630988

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

Certificate IGI LG816630988

Diamond specifications and retailer prices

From $4,394 USD
As of October 27, 2026
Save $13,789 USD (76%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $18,183 USD at Taylor and Hart · As of October 27, 2026
View at Taylor and Hart

About this 4.02ct lab-grown radiant diamond

This 4.02ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816630988 or 816630988. Listed at 17 retailers as of October 27, 2026, with prices from $4,394 to $18,183, a $13,789 spread on the same certified stone. Taylor and Hart lists it at $18,183. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.02
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.6°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816630988
Dimensions11.08 × 7.88 × 5.40 mm
L/W Ratio1.41
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
11.08 mm7.88 mm4.02 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816630988
Side View
Table 63.0%Crown 43.6°Girdle: Slightly ThickPavilion 35.7°Culet: NoneDepth 68.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $6,589 USD|Low: $4,394 USD|High: $22,019 USD|Avg: $8,967 USD|-17.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 16
Taylor and Hart
October 29, 2026
Retailer 6$4,394 USD
Retailer 12$4,605 USD
Retailer 4$4,921 USD
Retailer 8$5,098 USD
Retailer 16$5,098 USD
Retailer 11$5,140 USD
Retailer 14$5,771 USD
Retailer 7$6,370 USD
Retailer 1$6,589 USD
Retailer 13$6,633 USD
Retailer 5$7,178 USD
Retailer 10$7,877 USD
Retailer 15$7,888 USD
Retailer 3$9,537 USD
Retailer 9$10,611 USD
Retailer 2$14,165 USD
Taylor and Hart$18,183 USD

38 data points across 17 retailers

17 retailers$4,394 USD to $18,183 USD

A
Cheapest Retailer
-
$4,394 USD
A
Retailer 2
-
$4,605 USD
View
A
Retailer 3
-
$4,921 USD
View
Final sale: no returns
A
Retailer 4
-
$5,098 USD
View
A
Retailer 5
-
$5,098 USD
View
Price last confirmed 13 days ago
A
Retailer 6
-
$5,140 USD
View
A
Retailer 7
-
$5,771 USD
View
A
Retailer 8
-
$6,370 USD
View
A
Retailer 9
-
$6,589 USD
£5,189 GBP
View
A
Retailer 10
-
$6,633 USD
View
B+
Retailer 11
-
$7,178 USD
£5,652 GBP
View
B+
Retailer 12
-
$7,877 USD
€7,502 EUR
View
B+
Retailer 13
-
$7,888 USD
View
B+
Retailer 14
-
$9,537 USD
View
B+
Retailer 15
-
$10,611 USD
£8,355 GBP
View
B
Retailer 16
-
$14,165 USD
View
Most Expensive
B
Taylor and Hart
RDWU3MF · Oct 27
$18,183 USD
View
16 more retailers have this diamond
Prices start from $4,394 USDSave up to $13,789 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.

A
4.02ct Radiant
$4,394 USD