Coastal Discoveries

Good Evening,

New to the site. Collected these specimens at a far north coastline of NZ recently. Can anyone help with identifying these please? Thank you in advance![

The centre two might be petrified wood.


Looks like the sort of stuff that hangs around Whangaroa. I agree with MK that the main pieces look like petrified wood, the round one looks to be platy calcite crystals, or a very distant chance of it being barytes. My pick would be calcite though as the only barytes I know up this way are over at Mangamuka.