Platinum minerals

thumb|Sperrylite on chalcopyrite with [[magnetite, Oktyabersky Mine, Norilsk. Field of view 2.2 cm.]] Sperrylite is a platinum arsenide mineral with the chemical formula and is an opaque metallic tin white mineral which crystallizes in the isometric system with the pyrite group structure. It forms cubic, octahedral or pyritohedral crystals in addition to massive and reniform habits. It has a Mohs hardness of 6–7 and a very high specific gravity of 10.6.

Braggite is a sulfide mineral of platinum, palladium and nickel with chemical formula: (Pt, Pd, Ni)S. It is a dense (specific gravity of 10), steel grey, opaque mineral which crystallizes in the tetragonal crystal system. It is the central member in the platinum group end-members cooperite and vysotskite.

sulfide mineral

Bowieite is a rhodium-iridium-platinum sulfide mineral , 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.

Merenskyite is a rare telluride / bismuthinide mineral with the chemical formula . It is an opaque white to light gray metallic mineral that occurs as inclusions within other minerals such as chalcopyrite. It crystallizes in the trigonal crystal system.

alloy mineral

Garutiite is a rare mineral and is in the platinum group alloys. It's also part of the osmium group. It was discovered in the Loma Peguera deposit, Falcondo Mines, Bonao, Monseñor Nouel Province, Dominican Republic in 2009. It was named in honor of Giorgio Garuti (born 1945), professor at the University of Leoben, Austria, in recognition of his contributions to the understanding of the mineralogy of platinum-group elements.