- Medici Collection LLC
- 16.81 carat(s)
- United States (Los Angeles)
The largest cut neptunite weighs 16.81 carats (3.36 g), and is owned by the Medici Collection, LLC (USA) as verified on 9 March 2020.
Dion has donated many rare gemstones to various museums and educational institutions, including the Smithsonian Institute and Harvard University Mineralogical and Geological museum.