The shopkeeper insisted that I buy these garden ornaments along with my other finds. Since I only needed to add $3, I relented. When I got home, I found out that the platform has a tomoe symbol at the bottom. And the rock is unusually heavy but non-magnetic. I think I just got myself a hammerstone, but not sure what the platform is supposed to be. Can anyone help me identify these two? Thank you very much in advance.