Chrysophyta

The term Chrysophyta is a biological category that includes microscopic aquatic organisms known as diatoms, which have cell walls made of silica. These walls have unique and beautiful translucent geometric patterns. Diatoms are one of the most important aquatic organisms, serving as the base of the food chain, removing CO2 from the air, and releasing oxygen. Their crushed silica shells, sometimes called diatomaceous earth, are used in filters, insulation, abrasives, paints, nail polish, sound proofing, and as a base in dynamite. Their sharp, abrasive property can also be used as a natural insecticide. But to me, as a former biology professor, they are simply stunningly beautiful.