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Radiant|Lab Grown|IGI

5.10ct E FL Radiant Lab Grown Diamond

ID • E/FL • IGI LG821639486

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

Certificate IGI LG821639486

Diamond specifications and retailer prices

From £6,943 GBP
$9,246 USD
As of October 29, 2026
Save £18,006 GBP (72%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £24,949 GBP at Taylor and Hart · As of October 28, 2026
View at Taylor and Hart

About this 5.1ct lab-grown radiant diamond

This 5.1ct lab-grown radiant sits in the over five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG821639486 or 821639486. Listed at 14 retailers as of October 28, 2026, with prices from £6,943 to £24,949, a £18,006 spread on the same certified stone. Taylor and Hart lists it at £24,949. 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

5.10
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.5°
Pavilion angle34.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821639486
Dimensions12.21 × 8.59 × 5.68 mm
L/W Ratio1.42
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
12.21 mm8.59 mm5.10 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821639486
Side View
Table 63.0%Crown 43.5°Girdle: MED-STKPavilion 34.4°Culet: NoneDepth 66.1%

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 29
Current: £16,112 GBP|Low: £6,943 GBP|High: £53,654 GBP|Avg: £16,624 GBP|-19.4%
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
Taylor and Hart
October 29, 2026
Retailer 10£6,943 GBP
Retailer 12£7,849 GBP
Retailer 13£8,335 GBP
Retailer 2£8,660 GBP
Retailer 9£8,812 GBP
Retailer 6£9,583 GBP
Retailer 8£13,290 GBP
Retailer 7£14,231 GBP
Retailer 4£14,506 GBP
Retailer 5£15,409 GBP
Retailer 1£16,112 GBP
Retailer 11£21,906 GBP
Taylor and Hart£24,949 GBP
Retailer 3£43,135 GBP

36 data points across 14 retailers

14 retailers£6,943 GBP to £24,949 GBP

A
Cheapest Retailer
-
£6,943 GBP
$9,246 USD
A
Retailer 2
-
£7,849 GBP
$10,453 USD
View
A
Retailer 3
-
£8,335 GBP
$11,100 USD
View
A
Retailer 4
-
£8,660 GBP
HK$90,100 HKD
View
Retailer 5
-
£8,812 GBP
$11,735 USD
View
Price last confirmed 11 days ago
A
Retailer 6
-
£9,583 GBP
View
A
Retailer 7
-
£13,290 GBP
€16,855 EUR
View
A
Retailer 8
-
£14,231 GBP
View
B+
Retailer 9
-
£14,506 GBP
$19,317 USD
View
B+
Retailer 10
-
£15,409 GBP
$20,520 USD
View
B+
Retailer 11
-
£16,112 GBP
ZAR 346,633 ZAR
View
B+
Retailer 12
-
£21,906 GBP
$29,172 USD
View
Most Expensive
B+
Taylor and Hart
2R16V7D · Oct 28
£24,949 GBP
$33,224 USD
View
12 more retailers have this diamond
Prices start from £6,943 GBPSave up to £18,006 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
5.10ct Radiant
£6,943 GBP