Micro No. 34
by David Scharf - © Corbis. All Rights Reserved. - © David Scharf/Corbis
Volcanic Ash
Volcanic Ash - commercially used as a light weight aggregate component in light weight, high strength concrete for commercial construction, etc. 800X @ 8"x10" size Color synthesized with Scharf Multi-Detector Color SEM (Pat. #5,212,383) --- Image by © David Scharf/Corbis