This fluorite cluster has nice green and purple crystals that pop against the white matrix. This is a great size and quality specimen from a well-known mine in China. Sold with a metal stand.
Measurements: ~9-1/2" long x 2-1/2" deep x 6-1/2" tall
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 are 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 Illinois and Kentucky. Illinois became the leading Fluorite producer in the early 1940's, but during the 1990's, 90% of the U.S. Fluorite was imported with Illinois remaining the last U.S. producer.
Unfortunately Covid is again on the rise, in Evanston.
Although not mandatory, masks are highly recommended.