Mantle xenolith - reflected-light photomicrograph

Click on image to enlarge.         Photo © Daniel R. Snyder

Light green olivine , olive-green enstatite, and emerald-green chromian diopside in a Cr-diopside lherzolite xenolith. I'm leaning toward calling the curved, dark grain in the center spinel. This is, after all, a spinel lherzolite, and in such rocks spinel is usually near pyroxenes. San Carlos Indian Reservation, Arizona. Reflected-light photomicrograph of polished section. Imaged area 2.7 mm x 4 mm.