Smoky quartz is a grey, translucent variety of quartz. It ranges in clarity from almost complete transparency to a brownish-gray crystal that is almost opaque. Explore Art By God’s collection of Smoky Quartz at affordable prices in a variety of sizes. Gorgeous Smoky Quartz for sale. Natural Smoky Quartz, Smoky Quartz Points, Smoky Quartz Gemstones.