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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 $16,281 NZD
$9,176 USD
As of October 30, 2026
Save $36,343 NZD (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $52,624 NZD 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 $16,281 to $52,624, a $36,343 spread on the same certified stone. Frank Darling lists it at $52,624. 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: $52,624 NZD|Low: $16,281 NZD|High: $109,936 NZD|Avg: $32,157 NZD|-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
October 31, 2026
Retailer 11$16,281 NZD
Retailer 13$16,377 NZD
Retailer 6$16,590 NZD
Retailer 5$16,932 NZD
Retailer 3$18,692 NZD
Retailer 4$19,537 NZD
Retailer 14$20,674 NZD
Retailer 10$21,700 NZD
Retailer 12$21,842 NZD
Retailer 7$21,971 NZD
Retailer 8$31,121 NZD
Retailer 9$33,667 NZD
Retailer 2$36,860 NZD
Frank Darling$52,624 NZD
Retailer 15$101,596 NZD

39 data points across 15 retailers

15 retailers$16,281 NZD to $52,624 NZD

A+
Cheapest Retailer
-
$16,281 NZD
$9,176 USD
A
Retailer 2
-
$16,377 NZD
$9,230 USD
View
A
Retailer 3
-
$16,590 NZD
$9,350 USD
View
A
Retailer 4
-
$16,932 NZD
$9,543 USD
View
A
Retailer 5
-
$18,692 NZD
$10,535 USD
View
A
Retailer 6
-
$19,537 NZD
$11,011 USD
View
A
Retailer 7
-
$20,674 NZD
$11,652 USD
View
A
Retailer 8
-
$21,700 NZD
$12,230 USD
View
A
Retailer 9
-
$21,842 NZD
$12,310 USD
View
A
Retailer 10
-
$21,971 NZD
$12,383 USD
View
Final sale: no returns
A
Retailer 11
-
$31,121 NZD
$17,540 USD
View
A
Retailer 12
-
$33,667 NZD
£14,941 GBP
View
B+
Retailer 13
-
$36,860 NZD
€19,785 EUR
View
Most Expensive
B+
Frank Darling
P83F-17EL · Oct 31
$52,624 NZD
$29,659 USD
View
13 more retailers have this diamond
Prices start from $16,281 NZDSave up to $36,343 NZD

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
$16,281 NZD