Learn about garnet , a group of silicate minerals with diverse colors and rich history. Discover how garnet forms, its varieties, its structure, its uses, and its metaphysical properties. Garnet , any member of a group of common silicate minerals that have similar crystal structures and chemical compositions. They may be colourless, black, and many shades of red and green. Applications: Garnet is used in : " As abrasive for sandblasting for descaling of vessels and surface preparation. " In water jet cutting for a precision cutting job. " As abrasive in grinding wheels. " As medium for water filtration. " For rough glass polishing. Garnet is a group of silicate minerals with various colors and compositions, used as gemstones and abrasives. Learn about the crystal structure, hardness, magnetism, varieties and history of garnet from this comprehensive article.