Perlite is a naturally occurring siliceous rock found around the whole world. The volcanic glass, or perlite, is formed when lava (molten rock) spews out of a volcano, and cools in a rapid manner. Because of rapid cooling, water is trapped within the rock, and the lava forms into a glass-like structure. Agriculture • Perlite is used in ventilation of soil, rooting with cutting, improving water holding property of soil, helping agent for spreading droppings, improving physical properties of decoration or flowerpot soil properties as substrate material. • Perlite makes soil ventilated and improves its drainage with its %90 porosity and %60 ventilation porosity.