Smoky quartz is formed when the aluminium impurities in clear quartz are subjected to radioactive decay. If there is enough aluminium in the crystal, the colour of the quartz can turn completely black. This rock is called morian.
When treated with enough heat, the crystal will become clear again.
Hardness: 7
Colour: Smoky brown/grey to black
Lustre: Vitreous
Chemical Composition: SiO₂
Do you… Frequently or urgently need to urinate Often only pass small amounts of urine Have Pain or burning sensation when urinating These can be symptoms of urinary tract infections. There
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