Microscope Dust (IMAGE) Geological Society of America Caption Lunar dust as seen under a microscope. Each is covered in a glassy coating that may be smooth and round or jagged and sharp. Particle types shown include plagioclase (lower left, white), volcanic glass beads (upper right, smooth and black), impact-glass beads (upper left, black but rough), rock chips (rough and gray) and agglutinate (center, rough and gray, with hole). For scale, the smallest round bead at upper right is approximately 1 mm in diameter. Credit Larry Taylor Usage Restrictions None License Licensed content 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.