This ring is from Tacori's 18k925 Onyx Envy Collection. It has an approx 6 carat green onyx gemstone layered with clear quartz and is surrounded by a sterling silver crescent design with an 18K yellow gold Tacori gem seal. There is some slight wear visible on the silver. This item is no longer available in retail stores. Sold new for $490. The pictures do not do it justice. It is really a stunning piece of jewelry. I always get compliments when I wear it.