Cross-Polarized Light Image of the Lunar 'Rusty Rock' (image) University of California - San Diego Share Print E-Mail Caption Cross-polarized light image (0.07mm field of view) of a portion of the interior of the lunar 'Rusty Rock' impact melt breccia. Grey minerals are plagioclase grains and bright colored grains are pyroxene grains. Credit NASA Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.