Indian Celt stone? And other

[Unitedstatesofamerica1]

WHITE ONE IS 2 1/2 inches long and 1 inch wide
black one is 1/2 wide 1/2 long

 

[quito]

I think they are both natural. At best, the white one is a simple large graver, but I sure don't see a celt anywhere.

 

[BagLady]

Could be a grinding rock.

 

[creekhunter]

Just nature making nice shapes

 

[The Grim Reaper]

Great looking pictures that show nice detail. Unfortunately, both of the those are natural stones that show no evidence of ever being altered by man. A Celt will have a very pronounced blade edge that is obvious to the eye.

Here's a few pictures of some Celts and an Adz to show you what to look for.