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.

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Another variety also occurs in Western Australia at Turee Creek in the Pilbara region.

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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 .