If the stone consisted purely of one mineral, then it would be a mineral and not a rock.
Moon stone is a mineral
It has no official rock, stone, gem or mineral.
The is no official rock, stone, gem or mineral for Pennsylvania.
Rock salt
Rock salt
its a rock but it has certain characteristics of magical minerals
It has no official state rock, stone, gem or mineral.
lime stone
Mineral
A stone is a lump or mass of hard consolidated mineral matter. A small rock is a pebble, and stone.
There is no Official Rock, Mineral or Stone but it does have the Patuxent River Stone as the Official Maryland State Gem.
It has many official state symbols but no rock, no mineral, no gemstone and no stone.