Purchased in 2011 at the Tiffany & Co. Okayama Tenmaya store. I believe the diamond is the smallest size, so it's probably 0.03ct. I used it with care, but I haven't had the opportunity to wear it, so it's been stored at home. There is some wear and tear, so please refrain from purchasing if you are looking for a perfect item or are very particular. Only those who understand that this is a used item, please. Returns are not accepted to prevent switching of items, so please understand this before purchasing.