Smoky Quartz is a variety of quartz that ranges in color from light gray to deep brown or black. It is formed from natural radiation in the earth, which causes the silicon dioxide in the crystal to darken. This mineral is commonly found in various locations around the world, including Brazil, Scotland, and Switzerland. In addition to its aesthetic appeal, smoky quartz is believed by some to have grounding properties. It is often used in jewelry and crystal healing practices. The stone is also popular among collectors due to its unique colors and formations.