Smoky Quartz is the brown "smoky" variety of Quartz. It ranges in color from light grayish-brown to deep black. Smoky Quartz can be opaque, but is almost always transparent to translucent, even when in its darkest color shade. Smoky Quartz is very common and was never an historically important gemstone. Only in very recent times has it become a popular gemstone.
The word "quartz" is derived from the German word "quarz" and its Middle High German ancestor "twarc", which probably originated in Slavic (cf. Czech tvrdý ("hard"), Polish twardy ("hard"). Quarz which is of Slavic origin (Czech miners called it kremen). Other sources attribute the word's origin to the Saxon word Querkluftertz, meaning cross-vein ore.
Quartz is the hardest of common minerals. Only rare minerals, such as diamonds, are harder than quartz. Quartz has many uses. It is used to make mortar and glass. Lenses are made from rock quartz. The French scientist Pierre Curie discovered in the 1880's that slices of quartz crystals become electrically charged when squeezed. Because of this property, quartz is used in radio, television, radar and in highly accurate clocks. Pure quartz consists of only two elements - silicon and oxygen. It is clear and glass-like.
Smoky quartz is associated with the root chakra. Smoky quartz is a grounding and stabilizing stone. It brings calm and centering, lifts depression, enhances practicality, and generally removes negative energies, bringing happiness. Smoky quartz is also a good luck stone. It can also assist in tapping subconscious wisdom. Smoky quartz is a protective stone, particularly for physical protection, protection from negativity, and psychic protection. Physically, smoky quartz is helpful for kidneys, abdomen, pancreas, reproductive organs, menstrual cramps, fertility issues, water retention.