VARIETY OF CHALCEDONY Crossword Clue

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Crossword Puzzle Infos
Variety of chalcedony is a term used to describe a group of minerals that are composed of microcrystalline quartz. Sard and ONYX are two varieties of chalcedony, both of which are composed of silicon dioxide and have a waxy luster. Prase is another variety of chalcedony, which is characterized by its yellow-green color and is composed of quartz and feldspar.
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