Hiking in Colombia hundreds of km away from the emeralds area with my father in law, we found big stones with little streaks that tend to be of a color similar to turquoise and other little stones with a bit more of green and dark green. We'd like to know what they could be.

Edit: Now I'm curious about the blue greyish streaks in the other stones. I'm adding more pictures.

Another PoV from a little white stone with green streaks

Little white stones with green and blue greyish streaks

Grey stone with little green streaks

Big rock that we found next to the trail that got our attention to look for the small