
1) Beautiful stone 2) Calcium mineral 3) Cut mineral 4) Decorative stone 5) Garnet 6) Gemstone 7) Gemstone mineral 8) Jewel 9) Jewel mineral 10) Mineral jewel 11) Mineral gemstone 12) Polished jewel 13) Polished mineral 14) Prized stone 15) Precious gem 16) Precious jewel 17) Precious gemstone 18) Prized mineral
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https://www.crosswordclues.com/clue/andradite

1) Demantoid
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https://www.crosswordclues.com/clue/andradite

Andradite is a species of the garnet group. It is a nesosilicate, with formula Ca3Fe2Si3O12. Andradite includes three varieties: It was first described in 1868 for an occurrence in Drammen, Buskerud, Norway. Andradite was named after the Brazilian statesman, naturalist, professor and poet José Bonifácio de Andrade e Silva (1763–1838). ==Occurr...
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http://en.wikipedia.org/wiki/Andradite

calcium-iron garnet, perhaps the most spectacular garnet because of its high dispersion (separation of light into colours), even greater than that ...
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http://www.britannica.com/eb/a-z/a/71

[
n] - a garnet consisting of calcium iron silicate and having any color ranging from yellow and green to brown and black
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http://www.webdictionary.co.uk/definition.php?query=andradite
noun a garnet consisting of calcium iron silicate and having any color ranging from yellow and green to brown and black; used as gemstone
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https://www.encyclo.co.uk/local/20974

a mineral, calcium-iron garnet, CaFeSiO, occurring in brown, green, or black crystals.
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https://www.infoplease.com/dictionary/andradite
No exact match found.