Microbial biomineralization sometimes leads to periplasmic encrustation. which is predicted to enhance microorganism preservation in the fossil record. Mineral precipitation within the periplasm is however thought to induce death. as a result of permeability loss preventing nutrient and waste transit across the cell wall. https://www.nacrack.com/hot-savings-HiBoost-Home-15K-Smart-Link-F20G-5S-IoT-limited-super/