Hi someone asked me to make rings out of silver teaspoons. They are small coffee spoons with a rose detail at the top, and she said they were German. They do have a hallmark but when I heated one very gently and tried to bend it it cracked and broke in 2 places. It seems the silver is brittle so I don't think they are suitable for rings. I feel bad and wish I had refused but have made a lot of teaspoon rings before without this happening.,. Any advice welcome. Thanku