Smoky Quartz is the brown ‘smoky’ variety of the mineral quartz ranging from light brown to near opaque black. Amethyst and Citrine are also part of this variety. Alike to other quartz minerals it is said to have metaphysical healing properties, known for grounding to the earth, eliminating fear and calming negative emotion. Its name is much based upon its colour. Mohs scale of mineral hardness: 7