Description Drusy Crystal Necklace with Rubies, Gold Vermeil Chain and a lovely Lotus Flower Charm. 19 inches long. Drusy Crystals 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.