The Amazing Microphotography of Dr. Gary Greenberg - Every grain of sand is a jewel waiting to be discovered. That's what Dr. Gary Greenberg found when he first turned his microscope on beach sand. Gemlike minerals, colourful coral fragments, and delicate microscopic shells revealed that sand comprises much more than little brown rocks. Amazing microphotography showcases spectacular colours, shapes, and patterns. Join Dr. Greenberg as he explores the science and beauty of the sand grain.