smoky quartz Per Kg 250$

$250.00

Smoky quartz, very common coarse-grained variety of the silica mineral 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. Crystals of the mineral frequently contain inclusions of gas (carbon dioxide), liquid (often both water and liquid carbon dioxide), or solids (rutile). Smoky quartz from Mount Cairngorm, Scotland, is known as cairngorm and is a favourite ornamental stone in Scotland, where it is worn in brooches with Highland costume. Its properties are those of quartz. See silica mineral (table).

Smoky quartz, very common coarse-grained variety of the silica mineral 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. Crystals of the mineral frequently contain inclusions of gas (carbon dioxide), liquid (often both water and liquid carbon dioxide), or solids (rutile). Smoky quartz from Mount Cairngorm, Scotland, is known as cairngorm and is a favourite ornamental stone in Scotland, where it is worn in brooches with Highland costume. Its properties are those of quartz. See silica mineral (table).

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