Sand, Wiapio Beach, Hawaii, Hawaii
                These are the grains at lower central in the first images.
                  The multiple orders of interference color bands indicates
                  that the grains are far from an optic axis orientation.
              
              
                Transmitted Oblique Off Crossed Circular Polarized Light
                
Definition/Function:
                Significance in the Environment:
                Characteristic Features:
                Associated Particles:
                References:
                Deer, W.A., R.A. Howie, and J. Zussman, AN INTRODUCTION TO THE ROCK-FORMING MINERALS,
                Longman Scientific & Technical, 1992.
                
                Greenberg, Gary, A GRAIN OF SAND: NATURE'S SECRET WONDER, Voyageur Press, 2008.
                
                Welland, Michael, SAND: THE NEVER ENDING STORY, University of California Press, 2009.
                
                http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artjun01/clsand.html
                
(Good Information on the microscopy of sand, Great site for more information on
                microscopy in general)
                
                http://www.scientificamerican.com/article.cfm?id=a-grain-of-sand-natures-secret-wonder
                
(Good Information on Sand with links to more information on sand)
                
                http://www.sciencelive.org/component/option,com_mediadb/task,play/idstr,Open-feeds_fsc_exploring_sedimentary_processes_fsc02_02_m4v/vv,-2/Itemid,97
                
(Brief, very informative video on what can be learned from the shape of a sand
                grain.)