Amethyst is a purple variety of quartz, coloured by iron impurities.
When amethyst is subjected to intense heat, the chemical composition of the iron impurities is changed and the rock becomes yellow citrine.
Hardness: 7
Colour: Pale to dark purple
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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