The name is derived from its brown to grey colour. Very dark smoky quartz is called Morion. In Scotland, smoky quartz from the Cairngorm mountain range in the Scottish Highlands was used in jewellery and the stones accordingly were called Cairngorms.
Smoky quartz is a grey, translucent variety of quartz. It ranges in clarity from almost complete transparency to a brownish-grey crystal that is almost opaque. Some can also be black. Like other quartz gems, it is a silicon dioxide crystal. The smoky colour results from free silicon, formed from the silicon dioxide by natural irradiation.
This is a grounding stone that calms emotions, relieves stress, promotes positivity and provides protection from negativity.