Rose Coaster Set MCM Silvertone Art Deco

Beautiful. What I believe is a coaster set? It could be used for candles or Trinket trays. They are rather heavy, no markings. I don't know the metal composition, but I do know it's not silver as I tested for it. They do have some tarnish, mostly the bottom feet. Please note that I source my items from outside sources and do clean prior to listing and shipping. However, since items are from an outside source, I can not guarantee they came from smoke-free or pet free homes