Garnets are rare in igneous rocks. Garnets are used as grinding and polishing agents as well as for gemstones. Almondine garnets are brown, red to violet, or black. Almondine is also known as carbuncle. Almondine can be found in Tyrol, Sweden, Urals, Ski Lanka, India, Scotland, Norway, Adirondacks, California, South Dakota, and Michigan.
Andradite garnets are brown, black, green, yellow or colorless.
Also known as Demontoid, Melanite, and Topazolite, these garnets can be found in Fichtelgebirge, Baden, Switzerland, and Austria. Grossularite garnets are grren, yellowish, brown, red, or colorless. Leusogarnet is colorless, and Tsavolite is green. Spessartite garnets are yellow, orange or red brown. They can be found in Germany, Sweden, Madagascar, Sri Lanka, and Brazil.