Hand Tools Archive
Subject:
Good old Archimedes....Response To:
Re: How to measure density of ARK stones () John in NM
Bear in mind though, its a lot easier with a gem the size of a quarter than a big old Arkansas stone 
For a porous stone I doubt it will work - air in the stone. For dense stones I think it would do fine if one has a big enough beam balance to weigh the stone in the first place.
