CaratHunter
Plans
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 £3,300 GBP
$4,394 USD
As of October 30, 2026
Save £10,355 GBP (76%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £13,654 GBP at Taylor and Hart · As of October 30, 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 30, 2026, with prices from £3,300 to £13,654, a £10,355 spread on the same certified stone. Taylor and Hart lists it at £13,654. 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
Colour
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

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £4,963 GBP|Low: £3,300 GBP|High: £16,462 GBP|Avg: £6,526 GBP|-17.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Taylor and Hart
October 30, 2026
Retailer 6£3,300 GBP
Retailer 12£3,458 GBP
Retailer 4£3,695 GBP
Retailer 8£3,828 GBP
Retailer 16£3,828 GBP
Retailer 11£3,860 GBP
Retailer 14£4,334 GBP
Retailer 7£4,783 GBP
Retailer 1£4,963 GBP
Retailer 13£4,981 GBP
Retailer 5£5,390 GBP
Retailer 10£5,915 GBP
Retailer 15£5,923 GBP
Retailer 3£7,162 GBP
Retailer 9£7,968 GBP
Retailer 2£10,637 GBP
Taylor and Hart£13,654 GBP

39 data points across 17 retailers

17 retailers£3,300 GBP to £13,654 GBP

A
Cheapest Retailer
-
£3,300 GBP
$4,394 USD
A
Retailer 2
-
£3,458 GBP
$4,605 USD
View
A
Retailer 3
-
£3,695 GBP
$4,921 USD
View
Final sale: no returns
A
Retailer 4
-
£3,828 GBP
$5,098 USD
View
Retailer 5
-
£3,828 GBP
$5,098 USD
View
Price last confirmed 14 days ago
A
Retailer 6
-
£3,860 GBP
$5,140 USD
View
A
Retailer 7
-
£4,334 GBP
$5,771 USD
View
A
Retailer 8
-
£4,783 GBP
$6,370 USD
View
A
Retailer 9
-
£4,963 GBP
View
A
Retailer 10
-
£4,981 GBP
$6,633 USD
View
B+
Retailer 11
-
£5,390 GBP
View
Retailer 12
-
£5,915 GBP
€7,502 EUR
View
Price last confirmed 7 days ago
B+
Retailer 13
-
£5,923 GBP
$7,888 USD
View
B+
Retailer 14
-
£7,162 GBP
$9,537 USD
View
B+
Retailer 15
-
£7,968 GBP
View
B
Retailer 16
-
£10,637 GBP
$14,165 USD
View
Most Expensive
B
Taylor and Hart
RDWU3MF · Oct 30
£13,654 GBP
$18,183 USD
View
16 more retailers have this diamond
Prices start from £3,300 GBPSave up to £10,355 GBP

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
£3,300 GBP