This is a sample of coarse soil from the playa near Wilcox, Arizona. The out of focus areas are too close or too far from the lens to be in focus. The sample is placed on a black anodized aluminum plate. The illumination was by the red, green, and blue LEDs in the optical head.  This image is a composition from 3 monochrome images. The individual images are shown in thumbnail below. Clicking on a color name will take you to a full size view. A UV image was not taken because the UV image of the fines did not show any fluorescence. 

              Red ( Full Size View)                             Green ( Full Size View)                        Blue ( Full Size View)