pyroclastic tuff balls - set of three

Description

If making multiple purchases, please read the note following the
red text
below!
Pyroclastic tuff balls - set of three
Here is something different. These pyroclastic tuff balls were found weathering out of a pumice bed. We have looked at a lot of pumice over the years, and have never seen anything like these. They must have formed in a pyroclastic flow somewhat like snowballs. The primary materials of the flow are pumice, tuff fragments and volcanic ash. As this mixture was blasted downhill, rolling and slightly melted fragments of tuff acted like snowball cores. This particular flow is exposed in only one small area, so we are unlikely to have more of these when they are all sold.
These tuff balls range in size from roughly a golf ball to a baseball in size. They are being offered in sets of three (or four) with different sized examples in each set. Some are fairly lumpy with included fragments of tuff.
Select a specimen:
When more than one specimen is shown, you can select a particular specimen by telling us what is in front of it - a black mechanical pencil, a silver and black pen, a silver and blue pen, or one of those plus some number of coins, or you can let us make the selection.
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Shipping:
Priority Mail, which varies by weight and zip code. We can ship for less than eBay will charge, and will refund the overpayment as soon as the box is packed.
International customers:
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