Arizona Mushroom Rhyolite

Arizona Mushroom Rhyolite

Yes, it’s a thunderegg!  Arizona Mushroom Rhyolite, sometimes known as a Jasper.  These are often highly free-form masses and used for carvings and cabochons, but this is a nicely thunderegg shaped specimen.  I am told it is from ‘Bed 1’ of the location.  It appears (almost) completely agateless – a quartz ball.  But the charm of this stone lies in the rhyolite matrix and the gorgeous red and black sketched patterns.  Definitely a keeper!

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