Hardin County, Illinois
Named the Illinois state mineral on July 7,1965
Among other minerals suggested were galena,
calcite and quartz. None were
as colorful or important economically.
Fluorite is very beautiful with glassy cubes of
different shades of purple, blue
amethyst , green, yellow, pink and white. All
are highly collectable.
Hardin county is the source for most findings, it
accounts for about 50% of the fluorspar in the U. S.
Fluorite is a compound of calcium and fluorine and has
may uses such as hydrofluoric acid
(used in aerosols, Teflon) as a flux (in steel) zinc
smelting (a process of aluminum) and helps to
manufacture certain glasses and glazes.
Some geologists have said that some of the youngest
rocks found in Hardin county are older
than the Rocky Mountains!
by Deanna Heneghan
Genealogy Trails 2008 All Rights Reserved