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Radiant|Lab Grown|IGI

5.21ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG784644229

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

Certificate IGI LG784644229

Diamond specifications and retailer prices

From €8,181 EUR
$9,176 USD
As of October 30, 2026
Save €18,262 EUR (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €26,443 EUR at Frank Darling · As of October 31, 2026
View at Frank Darling

About this 5.21ct lab-grown radiant diamond

This 5.21ct 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 LG784644229 or 784644229. Listed at 15 retailers as of October 30, 2026, with prices from €8,181 to €26,443, a €18,262 spread on the same certified stone. Frank Darling lists it at €26,443. 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

5.21
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.1°
Pavilion angle34.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784644229
Dimensions12.05 × 8.70 × 5.77 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
12.05 mm8.70 mm5.21 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784644229
Side View
Table 63.0%Crown 40.1°Girdle: ThickPavilion 34.5°Culet: NoneDepth 66.3%

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: €26,443 EUR|Low: €8,181 EUR|High: €55,242 EUR|Avg: €16,175 EUR|-12.5%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 1, 2026
Retailer 11€8,181 EUR
Retailer 13€8,229 EUR
Retailer 6€8,336 EUR
Retailer 5€8,508 EUR
Retailer 3€9,393 EUR
Retailer 4€9,817 EUR
Retailer 14€10,389 EUR
Retailer 2€10,819 EUR
Retailer 12€10,975 EUR
Retailer 7€11,040 EUR
Retailer 10€15,638 EUR
Retailer 8€16,828 EUR
Retailer 9€18,522 EUR
Frank Darling€26,443 EUR
Retailer 15€51,052 EUR

40 data points across 15 retailers

15 retailers€8,181 EUR to €26,443 EUR

A+
Cheapest Retailer
-
€8,181 EUR
$9,176 USD
A
Retailer 2
-
€8,229 EUR
$9,230 USD
View
A
Retailer 3
-
€8,336 EUR
$9,350 USD
View
A
Retailer 4
-
€8,508 EUR
$9,543 USD
View
A
Retailer 5
-
€9,393 EUR
$10,535 USD
View
A
Retailer 6
-
€9,817 EUR
$11,011 USD
View
A
Retailer 7
-
€10,389 EUR
$11,652 USD
View
A
Retailer 8
-
€10,819 EUR
$12,135 USD
View
A
Retailer 9
-
€10,975 EUR
$12,310 USD
View
A
Retailer 10
-
€11,040 EUR
$12,383 USD
View
Final sale: no returns
A
Retailer 11
-
€15,638 EUR
$17,540 USD
View
B+
Retailer 12
-
€16,828 EUR
£14,862 GBP
View
B+
Retailer 13
-
€18,522 EUR
View
Most Expensive
B+
Frank Darling
P83F-17EL · Oct 31
€26,443 EUR
$29,659 USD
View
13 more retailers have this diamond
Prices start from €8,181 EURSave up to €18,262 EUR

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+
5.21ct Radiant
€8,181 EUR