"orange de méthyle"

Feldspar group; white-to-gray cleavages of sodic plagioclase; some show twinning.

Cut black mica cleavage sheets.

Feldspar group; calcium end member plagioclase crystals in pyroxene matrix.

Coarse, 'salt and pepper': dark pyroxene and light andesine. Provides perfect representation of an intermediate igneous rock.