Smoky Pendant: The Stone of Transformation A kind of quartz crystal known as "smoky quartz" is defined by its foreboding aspect. The peculiar color results from radiation that occurs inside the crust of the Earth and exposure to high temperatures during creation. The color ranges from light brown to dark brown to nearly black, although it may also have an orange or yellow tinge. Smoky quartz is often found in the states of Colorado, Brazil, India, Russia, sections of Scotland, and Africa. It has a connection to the astrological signs of Capricorn, Scorpio, and Sagittarius. This lively stone stimulates the root chakra.