Llanite Rhyolite

Llanite (also known as Llano Rhyolite, Texan Que Sera and Vulcanite) is a type of rhyolitic igneous rock with hexagonal bi-pyramids. It has Quartz inclusions, Microcline and Plagioclase Feldspars, Biotite, Iron Oxides, Magnetite and other trace minerals that form a conglomerate all within a deep brown matrix. The blue coloration of the quartz is due to ilmenite inclusions.  Llanite is somewhat rare.

Llanite is named after Llano County, Texas, the only place where it is found.

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