I made this pendant using solid genuine Australia opal rough and cut, drilled, and polished this piece myself. Lovely blue & green colors flashing across the face. Pics don't do it justice! 1.5mm drill hole. CHAIN NOT INCLUDED I have a variety of chains for sale in my store in different styles and lengths. Most, but not all, chains will fit most of my beads. If you want a specific chain for a specific bead check first. Feel free to check out all the items here in my DVHdesigns Store and don't hesitate to contact me with general inquiries or about custom work that I could make and list for you. Thanks for shopping DVHdesigns!