Years ago I went all the way to Peru to find Peruvian Opal and came back with 2 strands. Argh. These days it is much easier. I can buy it in NYC! I have added amethyst, Peruvian Opal, labradorite, carnelian, Czech crystal, Phosphopheridite, turquoise, ruby, apple coral and Thai silver. It measures 16 inches with 2 inches of extender chain.
This necklace also comes in labradorite , green onyx and amethyst.