In Medieval China, thin sheets of Smoky Quartz were used to make sunglasses. Today it is valued for its aesthetic qualities. Smoky Quartz is a form of quartz that is tinted by impurities in the stone. The color can range from almost clear to almost black, depending on the level of trace elements in the crystal. Smoky Quartz is associated with the (1st) root chakra.
Each Zentron branded puff heart is polished from all natural crystal and comes with a velvet carrying pouch and a Zentron rock information sheet. Each stone will have a slightly different appearance due to the uniqueness of the rock from which it is cut.