Monday Minerals: In Which Others Pick Up My Burden

I just haven't been very inspired to do my Monday Minerals and Friday Fragments lately. So imagine my pleasure when I found some of my favorite bloggers had posted minerals today...
Feldspar! (by Splotchy)
Zircon! (by Bubs)
Pyrite! (by SamuraiFrog)
Hematite! (by Mnmom)

I'd be a jerk if I didn't play along...

Orthoclase!
A very nice butterfly twin in the south steps of the Chemical Engineering building on the OSU campus. (quarter for scale near the bottom)