Beautiful black opal loose stone purchased during a trip to Australia. After returning to Japan, I asked a salesperson from a department store in Tokyo to help me, and I had the jewelry department create a semi-custom setting for the stone. They set the loose stone for me. They said it was a very beautiful stone! This necklace has a gorgeous design, with a beautiful black opal that displays vivid green and deep blue play-of-color, surrounded by rare tapered diamonds, creating a華やかでエレガントな design. I bought several, but I haven't had many opportunities to wear this one, so I'm offering it to someone who will appreciate it. It has been used a few times, but it's in good condition. The item for sale is the pendant head only. K18 Weight including the loose stone: 3-4g on a household scale (it fluctuates between 3 and 4g, so I think it's closer to 4g) The hallmark is a little faint, and I couldn't get a good picture of the 18K mark. I hope you understand. I don't know the carat weight of the opal or the diamonds, but it's a very beautiful item. #Opal #BoulderOpal #BlackOpal #Necklace #Ring