I finally got around to testing these ( I was waiting for some fresh acid) and they test very high in silver content > 90% according to my acid test. I polished a couple of them up and they have a nice shine to them, but I still don't know where they are from. They are super impressive when magnified... but so is pollen for that matter! I'm going to put them in eBay store as "pretty mystery beads" and leave it at that. Thanks! Annie