The word "drusy," is a mineralogical term used as both a noun and an adjective. The noun refers to a mineral coating of thin layers of tiny, tightly-packed crystals that resemble glittering sugar granules. The adjective refers to any such granulated crystal layers in reference to a given mineral; in this case, drusy quartz. Drusy quartz is usually found in the inside of geodes. When fashioned into loose gemstones and jewelry, it is often coated with a metallic color to capitalize on the glittering natural crystal facets and give it a more bold appearance.