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Radiant|Lab Grown|IGI

5.18ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG744514803

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

Certificate IGI LG744514803

Diamond specifications and retailer prices

From £6,362 GBP
$8,525 USD
As of October 30, 2026
Save £14,185 GBP (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £20,548 GBP at Frank Darling · As of October 29, 2026
View at Frank Darling

About this 5.18ct lab-grown radiant diamond

This 5.18ct lab-grown radiant sits in the over five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG744514803 or 744514803. Listed at 15 retailers as of October 29, 2026, with prices from £6,362 to £20,548, a £14,185 spread on the same certified stone. Frank Darling lists it at £20,548. 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

5.18
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle37.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG744514803
Dimensions11.90 × 8.56 × 6.05 mm
L/W Ratio1.39
Culet sizePointed
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
11.90 mm8.56 mm5.18 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG744514803
Side View
Table 65.0%Crown 37.7°Girdle: ThickPavilion 37.2°Culet: NoneDepth 70.7%

Caratlytics Score

How it works →
A+
Exceptional
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 30
Current: £20,548 GBP|Low: £6,362 GBP|High: £46,519 GBP|Avg: £13,811 GBP|-18.3%
Frank Darling
Retailer 2
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Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
October 30, 2026
Retailer 10£6,362 GBP
Retailer 12£6,462 GBP
Retailer 6£6,602 GBP
Retailer 4£6,617 GBP
Retailer 15£7,314 GBP
Retailer 13£8,210 GBP
Retailer 11£8,540 GBP
Retailer 9£8,911 GBP
Retailer 3£9,162 GBP
Retailer 7£9,190 GBP
Retailer 2£13,023 GBP
Retailer 5£14,345 GBP
Retailer 8£14,619 GBP
Frank Darling£20,548 GBP
Retailer 14£39,705 GBP

39 data points across 15 retailers

15 retailers£6,362 GBP to £20,548 GBP

A+
Cheapest Retailer
-
£6,362 GBP
$8,525 USD
A
Retailer 2
-
£6,462 GBP
$8,659 USD
View
A
Retailer 3
-
£6,602 GBP
$8,846 USD
View
A
Retailer 4
-
£6,617 GBP
$8,866 USD
View
A
Retailer 5
-
£7,314 GBP
$9,800 USD
View
A
Retailer 6
-
£8,210 GBP
$11,000 USD
View
A
Retailer 7
-
£8,540 GBP
$11,442 USD
View
A
Retailer 8
-
£8,911 GBP
$11,940 USD
View
A
Retailer 9
-
£9,162 GBP
$12,276 USD
View
A
Retailer 10
-
£9,190 GBP
$12,313 USD
View
Final sale: no returns
A
Retailer 11
-
£13,023 GBP
$17,450 USD
View
Retailer 12
-
£14,345 GBP
€18,305 EUR
View
Price last confirmed 7 days ago
B+
Retailer 13
-
£14,619 GBP
View
Most Expensive
B+
Frank Darling
P80I-50EL · Oct 29
£20,548 GBP
$27,532 USD
View
13 more retailers have this diamond
Prices start from £6,362 GBPSave up to £14,185 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+
5.18ct Radiant
£6,362 GBP