Bruneau jasper
Bruneau jasper is a variety of the mineral jasper. It is a "picture jasper" – a jasper that exhibits particular patterns and colors – and is used as an opaque gemstone.
The stone exhibits layered patterns of brown, reddish brown and cream color,[1] or sometimes of red and green color.[2] It was discovered in the Bruneau River canyon in Idaho,[1] near the bottom of the canyon walls,[2] where the rhyolite in which the jasper occurs is exposed for a length of 8 kilometres (5.0 mi).[3]
As of 2009 Bruneau jasper was no longer in production, and was difficult to locate.[1]
References
- ^ ISBN 9781434457028.
- ^ ISBN 9780870042287.
- CiteSeerX 10.1.1.832.9736.
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