Illinois. Its name is a French corruption of the native word Iliniwek meaning "Tribe of Superior Men," which Illinois has a nice variety of different minerals and fossils that are popular for rockhounds and fossil hunters to search for. ... Official state stone, or gem: 1967: Illinois: Calcium flouride (Flourite) Official state mineral: 1965: Indiana: Limestone (Salem limestone) Official stone: 1971: Iowa: Geode: State rock: 1967: Kansas Poe v Ulrey, 233 Ill 56, 84 NE 46 (Ill 1908). A great diversity of these materials are found beneath the land’s surface. What is the Illinois state mineral? Asked by Wiki User. In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. Official State Mineral of Illinois Illinois is the largest producer of fluorite in the United States (the most important deposits are located in southern Illinois at Rosiclare and Cave-in-Rock). The Illinois Supreme Court has long held that "[o]il and gas are classed as minerals, that term not being confined to metallic substances." Listing of all the official state rocks, minerals, gemstones for the 50 states, in order by state. See more ideas about rocks and minerals, illinois, minerals. The American Fluorite museum is located on the site of the Rosiclare Fluorspar and Mining Co., which was once the largest fluorspar mining company in the U.S. This clickable map has information about gems, minerals, and fossils in the United States. There are also many fossil hunting sites in the state. Fluorspar is the Illinois state mineral. MINERALOGY Fluorite (also is a halide mineral made up of calcium and fluorine, CaF2. Fluorite was declared the state mineral of Illinois in 1965. Fluorite. Apr 21, 2018 - Explore Lynn Grimes's board "Rocks and Minerals of Illinois" on Pinterest. Fluorite is the state mineral of Illinois which was once the largest fluorite producer in the United States. 0 0 1. A PRIMER ON MINERAL INTERESTS IN ILLINOIS REAL ESTATEby Joe Kusmierczak, ATG Law Clerk Minerals Defined The legal definition of "mineral" is broader than its scientific definition. The General Assembly established Fluorite as the state mineral in 1965. Top Answer. State Mineral: State Fossil "State Sovereignty, National Union" "Illinois" Prairie State: Fluorite: Tully Monster: State of Illinois What is now the state of Illinois was once a part of the vast Northwest Territory. Rockhounding and Mineral Collecting. Fluorite is used in … Fluorite, calcite, barite, galena, and many other crystal specimens are found in abundance in parts of southern Illinois. The word fluorite derives from the Latin noun fluo, meaning to flow. It features photographs, ore specimens, mining paraphernalia and colorful dioramas. Mohs Hardness Scale . There are many locations throughout the country that have very valuable sources of minerals such as opals, turquoise, jade, tourmaline, amethyst, and beryl. GEOLOGY OF ILLINOIS Illinois is rich in rock and mineral resources. A mineral's hardness is a measure of a mineral's resistance to scratching. Wiki User Answered 2013-01-03 04:38:21. The geologic resources are important to all of the state’s industries, including agriculture, construction, manufacturing, energy production, information delivery and … See Answer. 6.1" Purple Phantom Fluorite Sharp Cubic Crystals - Annabel Lee Mine . The Mohs Hardness Scale is used to help identify minerals. Mineral. Illinois is the largest producer of Fluorite in the United States.