Thursday, January 2, 2014
ROCK TRIVIA: FLOURITE
Fluorite is named from the Latin for a stream or flow of water. In 1852 the word fluorescence, was coined from fluorites from certain locations, which flourese due to impurities in the crystal.
One of the most famous localities of fluorite is Castleton in Derbyshire, England, where purple-blue fluorite was extracted from several mines or caves, including the famous Blue John Cavern. Recently discovered deposits in China have produced fluorite with coloring and banding similar to the classic Blue John stone.
Fluorite comes in a wide range of colors, the most being purple, blue, green, yellow, or colorless. Color zoning or banding is often present, adding to the visual interest.
Pictured is a bowl made of the famous Blue John Flourite. It is on display at Chatsworth House which has been home to the Cavendish family, since 1549.