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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 $12,365 AUD
$8,686 USD
As of October 30, 2026
Save $27,577 AUD (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $39,942 AUD at Frank Darling · As of October 31, 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 30, 2026, with prices from $12,365 to $39,942, a $27,577 spread on the same certified stone. Frank Darling lists it at $39,942. 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 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
Top View
12.25 mm8.73 mm5.28 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780661346
Side View
Table 66.0%Crown 41.9°Girdle: Slightly ThickPavilion 33.1°Culet: NoneDepth 64.0%

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: $39,942 AUD|Low: $12,365 AUD|High: $86,413 AUD|Avg: $25,681 AUD|-18.3%
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 30, 2026
Retailer 10$12,365 AUD
Retailer 6$12,457 AUD
Retailer 12$12,556 AUD
Retailer 4$12,859 AUD
Retailer 15$14,208 AUD
Retailer 13$15,956 AUD
Retailer 11$16,595 AUD
Retailer 9$17,147 AUD
Retailer 3$17,806 AUD
Retailer 7$17,860 AUD
Retailer 2$25,312 AUD
Retailer 5$27,890 AUD
Retailer 8$28,412 AUD
Frank Darling$39,942 AUD
Retailer 14$77,159 AUD

39 data points across 15 retailers

15 retailers$12,365 AUD to $39,942 AUD

A+
Cheapest Retailer
-
$12,365 AUD
$8,686 USD
A
Retailer 2
-
$12,457 AUD
$8,750 USD
View
A
Retailer 3
-
$12,556 AUD
$8,820 USD
View
A
Retailer 4
-
$12,859 AUD
$9,033 USD
View
A
Retailer 5
-
$14,208 AUD
$9,980 USD
View
A
Retailer 6
-
$15,956 AUD
$11,208 USD
View
A
Retailer 7
-
$16,595 AUD
$11,657 USD
View
A
Retailer 8
-
$17,147 AUD
$12,045 USD
View
A
Retailer 9
-
$17,806 AUD
$12,508 USD
View
A
Retailer 10
-
$17,860 AUD
$12,546 USD
View
Final sale: no returns
A
Retailer 11
-
$25,312 AUD
$17,780 USD
View
Retailer 12
-
$27,890 AUD
€18,658 EUR
View
Price last confirmed 7 days ago
B+
Retailer 13
-
$28,412 AUD
£15,715 GBP
View
Most Expensive
B+
Frank Darling
P82C-5EL · Oct 31
$39,942 AUD
$28,057 USD
View
13 more retailers have this diamond
Prices start from $12,365 AUDSave up to $27,577 AUD

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
$12,365 AUD