Orbicular Granite
Orbicular Granite for sale..click here
This geologically interesting rock comes from near Mount Magnet in Western Australia. The orbicules occur in a granodiorite matrix. They consist of andesine, plagioclase, hornblende & biotite arranged radially around a core of plagioclase &/or hornblende or less commonly mafic schist.
Here is a link to a site with
detailed geological information on the formation of the orbicular
granite...https://www.nationalrockgarden.com.au/rock-collection/orbicular-granite/
A large museum piece that I shipped to Tucson
last year. A polished face on the front .The back retains the natural
rough exterior.
An 18" sphere of orbicular granite.