Could it be a slicker stone used to smooth out linen - they sometimes added decoration to the base area used for smoothing out - it's a wild guess but I would say that the tall part is a handle of some sort and the flat rounded bottom has some function to do with smoothing out, I am pretty sure it is not simply an odd looking paperweight - age I don't know but the decoration to the base has canes and green mottling? that makes it a paperweight object - it looks Italian but I am not so sure that would fit in with the function or the age, maybe French?
Adam D555 :twisted: :twisted: