Diatom Glass LocketDiatoms, one of the most plentiful groups of organisms on Earth, numbering some two million species, are microscopic beings that are neither plant nor animal. Rather, diatoms are single celled microalgae that are found in almost all of the world's water. They are the largest producers of oxygen on our planet, creating 20 to 50 percent of the oxygen we breathe. In the nineteenth century, study of diatoms became popular amongst amateur microscopists,