Metamorphic
The rock that is very smooth is most likely the one that was found in riverbed because the river would probably toss the rock around and weather it down until it is smooth. Therefore, that means that the other rock was most likely found underground.
maybe yes
Intrusive igneous rock.
It is metamorphic rock
Schist is a metamorphic rock found deep underground but I don't know where some schist
Magma
Metamorphic
bedrocks
deep underground
The cooling and hardening of magma deep underground results in igneous rock. Rare gems and diamonds can be found in igneous rock.
metamorphic
Metamorphic
Magma
A diamond is a metamorphic rock formed from carbon. Diamond formation requires intense heat and extreme pressure, which naturally occurs deep underground.
The rock that is very smooth is most likely the one that was found in riverbed because the river would probably toss the rock around and weather it down until it is smooth. Therefore, that means that the other rock was most likely found underground.
Plutonic igneous rocks.