"Circular metal object that is approximately 5cm wide, not magnetic, silver in color, and weighs 70 grams. Has no writing and found in Ontario, Canada. What is this thing?"
A: "It looks like a lucky 4 leaf clover “cape fastener” as those usually have chains attached, maybe from a large coat by the size of it."
#11... And ..... I am no wiser. WTF is a crab water dropper???
Blanc de Chine porcelain water dropper dated to c.1640 see : Exhibition of Blanc de Chine (S.Marchant & Son, London, 1985)
Offered and sold at £12,000.
https://img.bestdealplus.com/ae04/kf/HTB1f9gpAVGWBuNjy0Fbq6z4sXXa8.jpg