I found a small, under 1 pound size piece of rough Orbicular Rhyolite the last time i was out in the Willowsprings area here in the Goldfields. These are the only two slabs i really got from the piece.
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| From Cabochon contest |
It undercuts badly, but there is potential in design and use of the harder agate zones. It has nice contrast and stands out well in patterns.
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| From Cabochon contest |
There is a darker Rhyolite area with hues of red and purple almost. This is the hardest areas of the cabochon. This second cabochon has less hard areas, which are the large open eye white/gray orbs. I am sure there is more to be found out there.
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| From Cabochon contest |
http://shainmayer.blogspot.com/2010/08/rockhounding-hiking-willow-creek-area.html