Onyx Agate Gemstone Necklace Pendant and Earring Set. This is a gorgeous pendant. I love all the colors, a deep purple and green color onyx agate pendant. The necklace is Russian amethyst gemstones and Green Phoenix Lapis Lazuli gemstones accent the green in the pendant. Included are a pair of silver plated fish hook style earrings with matching gemstones from the necklace. Approx. 17 inches.