Diatoms are a large group of algal organisms with cell walls composed of transparent, opaline silica. Diatoms have light-absorbing molecules that collect energy from the sun and turn it into chemical energy through photosynthesis. Through carbon fixation, diatoms remove CO2 from the atmosphere and create O2. Twenty to thirty percent of the oxygen we breathe is released from diatoms! Stoneware fired to 2350F in a soda and salt atmospheric reduction. 1-1.5” diameters.