Hi, I found this earlier this week. It rang in at a cracking 85 on the Deus tid, so about the same as nice big bronze coins. It is obviously manufactured as the hole has a sort of chamfer and there's file marks. I'd have said it was bronze, but it looks and feels more like a stone - it's hard to describe. It's non-magnetic and heavy.
I'm thinking a broken spindle whorl? Any ideas to what it is and what it could be made of?
Thanks for looking

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Deus with 11" X35 and 9" HF coils. MI 6 pinpointer.