Rhyolite (also known as Rainforest Jasper) is an igneous rock (volcanic) with a high silica content - and is chemically identical to granite, although sometimes mistaken as jasper - as in it's other name - Rainforest Jasper. It is mined in the USA and Africa.
The stone's mossy greens, browns and grays are reminiscent of a rainforest.
Metaphysically, Rhyolite is said to light the fire of creativity within the soul and help with self-realization.
Mohs hardness 7.