noun
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a clear, transparent quartz; a crystal.
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a piece of this cut in the form of an ornament; a crystal.
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a reddish variety of oligoclase feldspar, used as a gem, having a red and bright-yellow play of colour; sunstone.
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a solidified form of a substance in which the atoms or molecules are arranged in a definite pattern that is repeated regularly in three dimensions; a crystal.
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the plant Brleria cristata of Acanthaceae family.
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its purple coloured flower.