Template:POTD/2016-06-10

Picture of the day

A betafite octahedron collected in Bancroft, Ontario, Canada. Betafite, a mineral group in the pyrochlore supergroup, typically occurs as a primary mineral in granite pegmatites, and rarely in carbonatites. Though there is no applicable use for the accepted betafite species, it is an important ore of thorium, uranium, and niobium.Photograph: Heinrich Pniok