I create solarography: a brand name describing a photographic art form designed to hang in windows without a view using light energy from the sun for illumination.
These are images of diatoms, which are single cell fresh and salt water organisms and which come in many shapes and sizes. They are encased in a silica cell wall and when fossilized create structures with many benefits. The cylindrical / cavernous structures act as filters and reservoirs for water and nutrient retention. The spike structures are basically tiny glass shards that adhere to the legs of insects, cut them and kill them by means of dehydration, a natural insecticide.
Adding Diatomaceous Earth to potting soil increases water and nutrient retention on a microscopic level decreasing watering and feeding frequency. Spreading D Earth around plants creates a physical barrier for garden and home insects and pests.