Rhyolite
Spherulitic Rhyolite is also referred to as Rain Forest Jasper. II
It comes from Mount Hay in Queensland not far from the town of Rockhampton.
Another variety also occurs in Western Australia at Turee Creek in the Pilbara region.
Rhyolite is the general term for a type of volcanic rock, occurring mostly as lava flows, and characterized by a highly acid composition. Vesicular and/or spherulitic structure is very common in rhyolites. The cavities are often lined with opal and tridymite; they may also be filled with agate and chalcedony .