These pieces are 15n20, 20c & pure nickel. (the bottom one has pattinated after a fair bit of wear from my other half, I think it looks nice darker, but the nickel has to go for jewellery, good old EU !)
I made the liners from 925 sterling sheet & silver soldered them into a ring with a cr&ppy benzomatic blow torch, with laundry borax for flux
edit..
hope pics working now!












