Mushroom Rhyolite Mushroom Rhyolite is a special form stone with high silica content giving it a sand like appearance. Mushroom Rhyolite Jewelry has a very stunning texture associated with it which makes it a very standard choice in today's generation. Mushroom Rhyolite Rings are very helpful in making a person more determined, focused and dedicated. This way one person is able to stay focused and change the fate with hard work.