1. The grains of sperrylite are surrounded by later veins of pyrite. 2. He claims that the ore he gave me is sperrylite ( platinum arsenide ). 3. Sperrylite has a poor cleavage, and its polished surface has a metallic lustre.4. Sperrylite is composed of loose aggregate of bright silver cubes, some with octahedral modifications.5. Sperrylite has been identified in Finland from sulfide deposits generally associated with layered mafic-ultramafic complexes.6. Sperrylite crystals vary considerably in shape and size and are usually enclosed in a variety of host minerals.7. The most important occurrence of sperrylite is in the nickel ore deposit of Sudbury Basin in Ontario, Canada. 8. Sperrylite belongs to the pyrite group of minerals and therefore it shares similar structure and crystal habits with them.9. Sperrylite is a tin-white mineral known for its brilliant metallic luster, with a grey to black streak.10. Sperrylite is formed by contact metamorphism, as in indicated by the development of triple point annealing contacts with pyrrhotite grains.
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