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Radiant|Lab Grown|IGI

5.28ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG787623453

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

Certificate IGI LG787623453

Diamond specifications and retailer prices

From £8,157 GBP
$10,929 USD
As of October 29, 2026
Save £20,016 GBP (71%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £28,173 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

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 LG787623453 or 787623453. Listed at 11 retailers as of October 29, 2026, with prices from £8,157 to £28,173, a £20,016 spread on the same certified stone. Taylor and Hart lists it at £28,173. 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
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.3°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787623453
Dimensions12.11 × 8.73 × 5.84 mm
L/W Ratio1.39
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
12.11 mm8.73 mm5.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787623453
Side View
Table 62.0%Crown 42.3°Girdle: Slightly ThickPavilion 35.1°Culet: NoneDepth 66.9%

Caratlytics Score

How it works →
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 29
Current: £13,270 GBP|Low: £8,157 GBP|High: £51,212 GBP|Avg: £17,927 GBP|-40.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Taylor and Hart
October 30, 2026
Retailer 8£8,157 GBP
Retailer 10£8,959 GBP
Retailer 11£9,131 GBP
Retailer 7£9,393 GBP
Retailer 4£11,169 GBP
Retailer 1£13,270 GBP
Retailer 3£13,986 GBP
Retailer 5£14,812 GBP
Retailer 6£15,779 GBP
Retailer 9£26,008 GBP
Taylor and Hart£28,173 GBP
Retailer 2£51,212 GBP

32 data points across 12 retailers

11 retailers£8,157 GBP to £28,173 GBP

A
Cheapest Retailer
-
£8,157 GBP
$10,929 USD
A
Retailer 2
-
£8,959 GBP
$12,004 USD
View
A
Retailer 3
-
£9,131 GBP
$12,235 USD
View
A
Retailer 4
-
£9,393 GBP
$12,585 USD
View
A
Retailer 5
-
£11,169 GBP
View
A
Retailer 6
-
£13,270 GBP
$17,780 USD
View
A
Retailer 7
-
£14,812 GBP
View
Retailer 8
-
£15,779 GBP
€20,135 EUR
View
Price last confirmed 7 days ago
B
Retailer 9
-
£26,008 GBP
$34,848 USD
View
Most Expensive
B
Taylor and Hart
OLY1CTE · Oct 30
£28,173 GBP
$37,748 USD
View
9 more retailers have this diamond
Prices start from £8,157 GBPSave up to £20,016 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
5.28ct Radiant
£8,157 GBP