Quartz is the most common mineral on the face of the Earth. Gem varieties include amethyst (purple), citrine (yellow), milky quartz (cloudy, white variety), rock crystal (clear variety), rose quartz (pink to reddish-pink variety), and smokey quartz (brown to grey variety).
Gem varieties of quartz include: citrine, amethyst, rock crystal, rose quartz, and smokey quartz. There are also varieties of Quartz cat’s eye.
Colours: citrine (yellow); amethyst (purple); rock crystal (colourless); rose quartz (pink); and smokey quartz (purplish-brown).