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Radiant|Lab Grown|IGI

5.25ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG818640333

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

Certificate IGI LG818640333

Diamond specifications and retailer prices

From £4,463 GBP
$5,980 USD
As of October 27, 2026
Save £15,269 GBP (77%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £19,732 GBP at With Clarity · As of October 30, 2026
View at With Clarity

About this 5.25ct lab-grown radiant diamond

This 5.25ct 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 LG818640333 or 818640333. Listed at 21 retailers as of October 27, 2026, with prices from £4,463 to £19,732, a £15,269 spread on the same certified stone. With Clarity lists it at £19,732. 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

5.25
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.9°
Pavilion angle32.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818640333
Dimensions12.20 × 8.86 × 5.65 mm
L/W Ratio1.38
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
12.20 mm8.86 mm5.25 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818640333
Side View
Table 60.0%Crown 39.9°Girdle: Slightly ThickPavilion 32.6°Culet: NoneDepth 63.8%

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: £10,518 GBP|Low: £4,463 GBP|High: £19,732 GBP|Avg: £8,414 GBP|+1.1%
Retailer 1
Retailer 2
Retailer 3
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Retailer 17
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Retailer 20
With Clarity
October 29, 2026
Retailer 19£4,463 GBP
Retailer 6£4,677 GBP
Retailer 2£4,744 GBP
Retailer 13£5,162 GBP
Retailer 5£5,172 GBP
Retailer 10£5,177 GBP
Retailer 15£5,359 GBP
Retailer 9£6,146 GBP
Retailer 18£6,264 GBP
Retailer 12£6,485 GBP
Retailer 8£7,370 GBP
Retailer 20£7,626 GBP
Retailer 3£7,990 GBP
Retailer 16£8,004 GBP
Retailer 17£8,501 GBP
Retailer 7£9,797 GBP
Retailer 1£10,518 GBP
Retailer 14£10,591 GBP
Retailer 4£14,403 GBP
Retailer 11£18,075 GBP
With Clarity£19,732 GBP

11 data points across 21 retailers

21 retailers£4,463 GBP to £19,732 GBP

A
Cheapest Retailer
-
£4,463 GBP
$5,980 USD
A
Retailer 2
-
£4,677 GBP
$6,267 USD
View
A
Retailer 3
-
£4,744 GBP
$6,356 USD
View
A
Retailer 4
-
£5,162 GBP
$6,917 USD
View
Final sale: no returns
A
Retailer 5
-
£5,172 GBP
$6,930 USD
View
A
Retailer 6
-
£5,177 GBP
$6,937 USD
View
A
Retailer 7
-
£5,359 GBP
View
A
Retailer 8
-
£6,146 GBP
$8,235 USD
View
A
Retailer 9
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£6,264 GBP
$8,393 USD
View
A
Retailer 10
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£6,485 GBP
View
A
Retailer 11
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£7,370 GBP
View
A
Retailer 12
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£7,626 GBP
$10,218 USD
View
A
Retailer 13
-
£7,990 GBP
$10,706 USD
View
A
Retailer 14
-
£8,004 GBP
$10,725 USD
View
Retailer 15
-
£8,501 GBP
€10,848 EUR
View
Price last confirmed 7 days ago
A
Retailer 16
-
£9,797 GBP
$13,127 USD
View
A
Retailer 17
-
£10,518 GBP
ZAR 227,670 ZAR
View
A
Retailer 18
-
£10,591 GBP
View
B+
Retailer 19
-
£14,403 GBP
$19,299 USD
View
B+
Retailer 20
-
£18,075 GBP
$24,219 USD
View
Most Expensive
B+
With Clarity
818640333 · Oct 30
£19,732 GBP
$26,439 USD
View
20 more retailers have this diamond
Prices start from £4,463 GBPSave up to £15,269 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
5.25ct Radiant
£4,463 GBP