One word: plagioclase

An afternoon of snapping photos in a cemetery yielded a superb specimen of gabbro filled with large grains of plagioclase feldspar. With this, blue labradorite can stop being a stand-in for plagioclase and move to its own page in the mineral gallery, befitting its status as a semiprecious stone. I make an effort to show minerals as they really appear in rocks, rather than flashy but uninstructive museum specimens.