1) Beautiful stone 2) Cut mineral 3) Decorative stone 4) Gemstone mineral 5) Gemstone 6) Jewel mineral 7) Jewel 8) Mineral gemstone 9) Mineral jewel 10) Polished mineral 11) Polished jewel 12) Prized stone 13) Precious stone 14) Precious jewel 15) Precious gem 16) Precious gemstone 17) Prized mineral
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https://www.crosswordclues.com/clue/sperrylite
Sperrylite is a platinum arsenide mineral with formula: PtAs2 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....
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http://en.wikipedia.org/wiki/Sperrylite
• (n.) An arsenide of platinum occuring in grains and minute isometric crystals of tin-white color. It is found near Sudbury, Ontario Canada, and is the only known compound of platinum occuring in nature.
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http://thinkexist.com/dictionary/meaning/sperrylite/
Sper'ry·lite noun [ Named after F. Latin
Sperry , who discovered it.]
(Min.) An arsenide of platinum occuring in grains and minute isometric crystals of tin-white color. It is found near Sudbury, Ontario Canada, and is the only known compound of platinum occuring in nature.
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http://www.encyclo.co.uk/webster/S/161
Sperrylite is a rare natural compound of platinum and arsenic found in the nickel mines of Sudbury in Canada. It has the formulae PtAs2 and a relative hardness of 7.
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http://www.probertencyclopaedia.com/browse/HS.HTM
Platinum arsenide
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http://www.translationdirectory.com/glossaries/glossary075.htm
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