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Radiant|Lab Grown|IGI

5.18ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG744514803

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

Certificate IGI LG744514803

Diamond specifications and retailer prices

From $15,126 NZD
$8,525 USD
As of October 30, 2026
Save $33,724 NZD (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $48,850 NZD at Frank Darling · As of October 31, 2026
View at Frank Darling

About this 5.18ct lab-grown radiant diamond

This 5.18ct 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 LG744514803 or 744514803. Listed at 15 retailers as of October 30, 2026, with prices from $15,126 to $48,850, a $33,724 spread on the same certified stone. Frank Darling lists it at $48,850. 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

5.18
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle37.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG744514803
Dimensions11.90 × 8.56 × 6.05 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
11.90 mm8.56 mm5.18 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG744514803
Side View
Table 65.0%Crown 37.7°Girdle: ThickPavilion 37.2°Culet: NoneDepth 70.7%

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: $48,850 NZD|Low: $15,126 NZD|High: $110,592 NZD|Avg: $30,983 NZD|-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 31, 2026
Retailer 11$15,126 NZD
Retailer 13$15,364 NZD
Retailer 6$15,695 NZD
Retailer 5$15,731 NZD
Retailer 3$17,388 NZD
Retailer 14$19,517 NZD
Retailer 12$20,302 NZD
Retailer 10$21,185 NZD
Retailer 4$21,781 NZD
Retailer 7$21,847 NZD
Retailer 8$30,962 NZD
Retailer 2$34,188 NZD
Retailer 9$34,756 NZD
Frank Darling$48,850 NZD
Retailer 15$94,393 NZD

41 data points across 15 retailers

15 retailers$15,126 NZD to $48,850 NZD

A+
Cheapest Retailer
-
$15,126 NZD
$8,525 USD
A
Retailer 2
-
$15,364 NZD
$8,659 USD
View
A
Retailer 3
-
$15,695 NZD
$8,846 USD
View
A
Retailer 4
-
$15,731 NZD
$8,866 USD
View
A
Retailer 5
-
$17,388 NZD
$9,800 USD
View
A
Retailer 6
-
$19,517 NZD
$11,000 USD
View
A
Retailer 7
-
$20,302 NZD
$11,442 USD
View
A
Retailer 8
-
$21,185 NZD
$11,940 USD
View
A
Retailer 9
-
$21,781 NZD
$12,276 USD
View
A
Retailer 10
-
$21,847 NZD
$12,313 USD
View
Final sale: no returns
A
Retailer 11
-
$30,962 NZD
$17,450 USD
View
B+
Retailer 12
-
$34,188 NZD
€18,351 EUR
View
B+
Retailer 13
-
$34,756 NZD
£15,424 GBP
View
Most Expensive
B+
Frank Darling
P80I-50EL · Oct 31
$48,850 NZD
$27,532 USD
View
13 more retailers have this diamond
Prices start from $15,126 NZDSave up to $33,724 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+
5.18ct Radiant
$15,126 NZD