12" Polished Mushroom Jasper Slab - Arizona

Mushroom Jasper, also known as "Mushroom Rhyolite", is the name for an orbicular rhyolite found in several areas northwest of Phoenix, Arizona. Often, formations of quartz and agate can be found throughout these specimens. In some instances these quartz pockets will contain purple amethyst crystals. This rhyolite earns its name after the earthy brown- to green-colored orbicular formations that, in many cases, have the appearance of a mushroom cap.