Illinois Fluorite (Best Available) 7b5c325ff21ad28bbcdf091bf6ed4e2d The exact types of animals

The exact types of animals that laid these eggs are unknown

Astrophyllite is a rare silicate mineral composed of potassium

or the very rare red topaz

Faceted stones from this location have been found in the ruins of Ancient Greece and extensively in Egypt

spiny oyster

Illinois Fluorite (Best Available) 7b5c325ff21ad28bbcdf091bf6ed4e2d The exact types of animalsFluorite is the "State Mineral" of Illinois. Fluorite forms in a variety of colors and is transparent to translucent in clarity. The chemical composition of Fluorite is CaF2, (calcium & fluorine.) The variation in colors is due to trace amounts of other elements replacing the calcium during the crystalline formation. Fluorite is used in a variety of industrial purposes and the overwhelming percentage of Fluorite in the United States was mined in