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Radiant|Lab Grown|IGI

5.17ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG587318953

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

Certificate IGI LG587318953

Diamond specifications and retailer prices

From HK$19,890 HKD
$2,535 USD
As of November 2, 2026
Save HK$12,318 HKD (38%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: HK$67,894 HKD at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 5.17ct lab-grown radiant diamond

This 5.17ct lab-grown radiant sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG587318953 or 587318953. Listed at 3 retailers as of November 1, 2026, with a 62% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

5.17
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG587318953
Dimensions11.77 × 8.60 × 5.89 mm
L/W Ratio1.37
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
11.77 mm8.60 mm5.17 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG587318953
Side View
Table 66.0%Crown 46°Girdle: MediumPavilion 35.7°Culet: NoneDepth 68.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: HK$67,894 HKD|Low: HK$19,890 HKD|High: HK$67,894 HKD|Avg: HK$40,383 HKD
Frank Darling
Retailer 2
Retailer 3
October 19, 2026
Retailer 3HK$19,890 HKD
Retailer 2HK$32,208 HKD
Frank DarlingHK$67,894 HKD

4 data points across 3 retailers

3 retailersHK$19,890 HKD to HK$32,208 HKD

B
Cheapest Retailer
-
HK$19,890 HKD
$2,535 USD
B
Retailer 2
-
HK$32,208 HKD
$4,105 USD
View
Most Expensive
Frank Darling
LV34-4ABA · Nov 2
HK$67,894 HKD
$8,653 USD
View
Price under review
2 more retailers have this diamond
Prices start from HK$19,890 HKDSave up to HK$12,318 HKD

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.

B
5.17ct Radiant
HK$19,890 HKD