Roger Weller, geology instructor
firstname.lastname@example.org copyright 2010-R.Weller
Anorthite is the calcium end member of the plagioclase feldspars. Large crystals
of anorthite are rarely found and the mineral is rather dull and uninteresting.
However, it turns out that a large portion of the Moon's surface is made of anorthite.
This specimen of anorthite is only about 1.5 centimeters.
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.