Purchased from Jewelry Tsutsumi. Used a few times and stored at home. The warranty is missing, so the type of stone is unknown. I don't have a scale, so I don't know the weight. It's a delicate ring, so I think it's lightweight. I will not reply to inquiries about the weight, so please understand. The ring will be packaged only and shipped via Yu-Packet Post. Recycled materials may be used for packaging. No claims, refunds, or returns accepted.