Vermiculite is a naturally occurring mineral composed of shiny flakes, resembling mica. It was mined in Libby, Montana, from the 1920s until the mine closed in 1990. While in operation, the mine in Libby produced most of the world's supply of vermiculite. Vermiculite has a wide range of uses that take advantage of its remarkable attributes of resilience to fire, refractory nature, thermal and acoustic insulation properties, absorption capacity, low density and ease of handling. It has been used in various industries for over 80 years. It is used in the construction, agricultural, horticultural and industrial markets. Vermiculite's distinct properties offer a number of benefits including high heat and fire resistance, high absorbency, excellent insulating and so on. Vermiculite was used in insulation products in many Canadian and American houses.