Several years ago I purchased an amazing Mushroom Jasper/Rhyolite slab at the Tucson Gem Shows. I was attracted by the bright orange of the matrix , and the amazing gray, Perlite “Mushrooms” floating like gardens in the Silica matrix. Much of Mushroom Jasper, if it has a matrix color, it is redish hues, and not bright orange.
Mushroom Jasper’s source is NW of Phoenix on BLM land. My sources testify that it is very difficult to cut through all the bureaucracy to even get a permit to mine for it. In general, it is a money losing proposition, digging for this Ryolite.
As is my norm at the Tucson Shows, I shipped large flat rate boxes back to Michigan, full of goodies purchased at the shows. Try as I will I just can’t seem to organize all my rocks as I should. This Mushroom Jasper/Ryolite slab was relegated to a drawer in my slab cabinet. The Steel cabinet has about 50 or more drawers containing assorted slabs, ready to cut, shape, and polish. Long story short, this beautiful Rhyolite was covered by other slabs, and forgotten.
Rhyolite is an extrusive igneous rock formed when the magma rapidly erupted from a volcano, and is cooled rapidly on the surface, rather then cooling slowly underground. There are many forms of Rhyolite including Rain Forest Jasper, Butterfly Jasper, and Obsidian. Those mentioned are attractive, but Pumice is also a Rhyolite, and not a jewelry stone.
Ten years later, while rooting through the drawers I reconnected with the Mushroom Jasper, and immediately took it to my shop for cutting. This cutting produced one of the most amazing cabochons I’ve ever produced.
Last year I loaded some trays filled with cabs that I thought I might work on while “suffering” as a snowbird in Florida. Subsequently, I chose the Rhyolite one day, repolished it, and wrapped it in Argentium Silver.
Since the cab was 2 3/4″ X 1 1/2″ is a good sized cabochon, for an eye catching Pendant. After a few hours of careful wrapping, a gorgeous pendant, meticulously wrapped in Argentium Sterling was produced.
I used three times the precious metal wire I normally use for a pendant. This stone demanded the extra attention. Rhyolite is not an uncommon stone, but what I was working on, was an uncommonly attractive Mushroom Rhyolite Cabochon.
Here’s a link to the Orange Mushroom Pendant, if you’re interested.