smoky quartz


smoky quartz

noun

Definition of SMOKY QUARTZ

:  cairngorm

First Known Use of SMOKY QUARTZ

1837

smoky quartz

noun    (Concise Encyclopedia)

Common, coarse-grained variety of quartz that ranges in colour from nearly black through smoky brown. No distinct boundary exists between smoky and colourless quartz. Its abundance causes it to be worth considerably less than either amethyst or citrine. Heating bleaches the stone, the colour sometimes passing through yellow; these yellow pieces are often sold as citrine.

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