Aluminium Silicate is a mineral composed of aluminium and silicate, commonly known as kyanite (7 letters). It is an important industrial mineral used in the production of refractory materials, ceramics, and abrasives. Kyanite has a unique property of having different hardness on different crystal axes, making it suitable for use in grinding and polishing applications. It also has a high thermal shock resistance, making it useful in the production of firebricks.