Vermiculite is a naturally occurring mineral that expands when heated, forming lightweight, absorbent, and fire-resistant granules. It is widely used in agriculture, horticulture, and construction due to its unique properties. In gardening, vermiculite improves soil aeration, retains moisture, and supports seed germination and root growth. In construction, it's used for insulation, fireproofing, and lightweight concrete. Non-toxic and sterile, vermiculite is valued for its ability to enhance soil structure and provide long-term benefits in both professional and home applications.