Rutile, Mt. Painter, Australia.

Rutile, Mt. Painter, Australia.

Rutile, TiO2  is titanium dioxide, and trimorphous with anatase, and brookite. It is a common accesssory mineral in high temperature, high pressure metamorphic rocks, and in igneous rocks. These specimens were collected by Jim Nicholls, co-founder of the club from Walpole road quarry, Mount Crawford, Australia. The quarry is described as being a kaolin quarry with intersecting quartz veins, which also contain numerous rutile crystals.