Yes, mostly organic. The chloroplast inside the diatom shell is basically a plant with most of the typical algae components. The diatom is just a soft bodied algae (phytoplankter) with a glass shell. When consumed the organism digests the inside contents and expels the shell. Sometimes the shells are fractured depending on the thickness of the shell; some are thin, some are thick, some single and some in chains or linked together.
Last edited by Bill Cody; 07/24/14 08:18 PM.
