Diatomaceous earth is a soil commonly used in bonsai trees. It is easily crumbled with a soft texture. It was discovered by goods waggoner Peter Kasten In 1836. It was discovered while he was sinking a well and accidentally came upon this substance.
It also has a large variety of uses beyond soil such as filtration, used for its abrasive properties, pest control and hydroponics.
Caution is needed to handle this soil as it can cause damage to the lungs when inhaled.