Color: Gold Material: K14 Top Immediate purchase is welcome!! However, if you follow me and make a purchase, I will give you a -300 yen discount, so please take this opportunity to follow me. If you have followed me, please be sure to comment before purchasing. ♪♪ Also, please be sure to read my profile. My grandfather was an antique enthusiast, and my grandmother was a jeweler. I will occasionally be listing items from them as well. I think there are items that are one-of-a-kind and valuable. If you like them, please take a look at my other products, feeling like you're watching "Anything Goes Appraisal"! 【Engraving】 585 (See photo 3) If you look closely, the top of the 5 is cut off, so please refrain from purchasing if you are concerned. In Japan, this is equivalent to K14. Size: See photo 6 【Product Description】 When I received it from my grandmother as a souvenir from an overseas trip, I had never seen a black opal before, so I was really happy and just kept looking at it. I did some research for the listing, and I thought it might be a boulder opal, but I'm not sure, so I'd like to connect with someone who likes the atmosphere and color of this opal! I recently started using Mercari and I'm happy to have met so many nice people, so I don't think I'll be able to get it again, but I decided to list it for the ⭐️Special Festival⭐️. Recently, my grandmother has also been saying, "I've met so many nice people" on Mercari. My grandmother loves jewelry, but she doesn't keep any certificates of authenticity, and she bought them overseas, so I can't confirm them at a store. Therefore, I will sell them at a bargain price compared to the purchase price. If you like this color and atmosphere, please consider purchasing only if you are okay with that. Only those who share the same hobby and like used or vintage items, please. If you are a nervous person or someone who cannot enjoy a pleasant transaction, I am sorry, but please refrain from purchasing. The chain is just a bonus and is not gold or anything, so I will only include it for those who want it. Please comment. Please refer to the photos for the condition of the product. Items other than those listed as new are only used items and vintage items, so please refrain from purchasing if you are a nervous person. I would like to value the connection between people, even though it's online, so please take care of 【Koyukicchi】. ⭐️Special⭐️ sale item.