Radiant|Lab Grown|IGI

5.28ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG780661346

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

Certificate IGI LG780661346

Diamond specifications and retailer prices

From £6,483 GBP

$8,686 USD

As of October 30, 2026

Save £14,457 GBP (69%) vs most expensive(unlock to see where)

15 retailers carry this diamond

Most expensive: £20,940 GBP at Frank Darling · As of October 29, 2026

View at Frank Darling

About this 5.28ct lab-grown radiant diamond

This 5.28ct 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 LG780661346 or 780661346. Listed at 15 retailers as of October 29, 2026, with prices from £6,483 to £20,940, a £14,457 spread on the same certified stone. Frank Darling lists it at £20,940. 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

5.28

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle41.9°

Pavilion angle33.1°

OriginLab Grown

Grading LabIGI

CertificateIGI LG780661346

Dimensions12.25 × 8.73 × 5.59 mm

L/W Ratio1.40

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

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG780661346

Side View

Caratlytics Score

How it works →

A+

Exceptional

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: £20,940 GBP|Low: £6,483 GBP|High: £45,302 GBP|Avg: £13,732 GBP|-18.3%

Frank Darling

Retailer 2

Retailer 3

Retailer 4

Retailer 5

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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£6,483 GBP

Retailer 6£6,530 GBP

Retailer 12£6,583 GBP

Retailer 4£6,742 GBP

Retailer 15£7,448 GBP

Retailer 13£8,365 GBP

Retailer 11£8,700 GBP

Retailer 9£8,990 GBP

Retailer 3£9,335 GBP

Retailer 7£9,363 GBP

Retailer 2£13,270 GBP

Retailer 5£14,621 GBP

Retailer 8£14,895 GBP

Frank Darling£20,940 GBP

Retailer 14£40,451 GBP

39 data points across 15 retailers

15 retailers£6,483 GBP to £20,940 GBP

A+

Cheapest Retailer

£6,483 GBP

$8,686 USD

Retailer 2

£6,530 GBP

$8,750 USD

View

Retailer 3

£6,583 GBP

$8,820 USD

View

Retailer 4

£6,742 GBP

$9,033 USD

View

Retailer 5

£7,448 GBP

$9,980 USD

View

Retailer 6

£8,365 GBP

$11,208 USD

View

Retailer 7

£8,700 GBP

$11,657 USD

View

Retailer 8

£8,990 GBP

$12,045 USD

View

Retailer 9

£9,335 GBP

$12,508 USD

View

Retailer 10

£9,363 GBP

$12,546 USD

View

Final sale: no returns

Retailer 11

£13,270 GBP

$17,780 USD

View

Retailer 12

£14,621 GBP

€18,658 EUR

View

Price last confirmed 7 days ago

B+

Retailer 13

£14,895 GBP

View

Most Expensive

B+

Frank Darling

P82C-5EL · Oct 29

£20,940 GBP

$28,057 USD

View

13 more retailers have this diamond

Prices start from £6,483 GBPSave up to £14,457 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.

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A+

5.28ct Radiant

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