
1) Orthorhombic mineral 2) Platinum mineral 3) Sulfide mineral
Found on
https://www.crosswordclues.com/clue/bowieite

Bowieite is a rhodium-iridium-platinum sulfide mineral (Rh,Ir,Pt)2S3, found in platinum-alloy nuggets from Goodnews Bay, Alaska. It was named (by the IMA in 1984) after the British scientist Stanley Bowie (1917–2008), in recognition of his work on identification of opaque minerals. ...
Found on
http://en.wikipedia.org/wiki/Bowieite
No exact match found.