Description Drusy Crystal Necklace with Green Chrome Diopside Gemstones, Gold Vermeil Chain 19 inches, and a lovely Lotus Flower Charm. Drusy’s are gemstones with a natural surface texture much like fine sugar crystals that formed on the Quartz by the phenomena of micro-crystalline facets millions of years ago. Drusy crystals went unnoticed in the jewelry world until recently, when they began appearing in the work of noted carvers and jewelry designers. Chrome Diopside is a gem found in Siberia – and is commonly known as the Russian Emerald. Chrome Diopside is an all natural untreated gemstone. No heat, radiation, diffusion or oil treatments are used. This makes Chrome Diopside one of  the most pure semi-precious gem available.