This is a K10 yellow gold diamond necklace purchased from Jewelry Tsutsumi. I received a coupon when I registered for Tsutsumi's online shop, and since I had it, I ended up buying quite a few items. However, it's been over a year since I bought it, and I haven't used it. I thought it would be better to pass it on to someone who would actually wear it, as the necklace probably wants to be worn... so I've decided to list it since it doesn't seem like it will see the light of day otherwise. Because of this, I don't want to sell it to someone looking to profit from the gold's market value, so I will not be listing the weight in grams. If you like the design, please wear it often. However, although it is completely unused, it has been stored personally, so please refrain from purchasing if you are overly concerned about its condition. Thank you. *Due to shipping costs, the box will not be included. It will be carefully packaged, and only the necklace itself will be delivered. Please understand. *I am also listing a K10WG necklace in a different color.