FLUORITE
Fluorite, or calcium fluoride (CaF2), is a simple halide commonly occurring as a glassy, hued, vein in a variety of mineral environments. It is commonly found in metallic hydrothermal deposits associated with lead, silver, galena, sphalerite, cobalt and other economic minerals. It also occurs in cavities of pegmatites, in hot-springs areas and in sedimentary rocks, primarily limestones that have been permeated by aqueous fluoride.
One of fluorite's ingredients, the active element fluorine, is a violent poison that is also the most active of elements, capable of eating through glass and metal. Discovery and isolation of this element caused the death and permanent injury of many scientists. Another fluorine compound, hydrofluoric acid, is used to etch glass, dissolve quartz, and other minerals.
But fluorite is a harmless mineral of great beauty and variety, ranging from yellow to green to blue to red and all shades in between. It forms in lovely crystals that range from simple cubes to complex combinations showing as many as 48 faces or more.
The name flourite is from the Latin "fluere" which means, "to flow", because it melts easily and is used as a flux in the smelting of metallic ores. Fluorite is used in the manufacture of steel and hydrofluoric acid. It is a staple in one's stones usedfor determining hardness of other stones, because of its rating of 4. It is a relatively soft stone and can scratch or chip easily, so is rarely used in jewellery - although is a very popular stone amongst collectors. It occurs in a variety of colours, including colourless, green, blue, purple, magenta, pink, yellow, or a combination of several colours.
Hardness: 4. Other characteristics.
![]() fluorite from Illinois, USA Blue John Fluorite
![]() ![]() Blue John fluorite is a famous variety of purple and yellow banded fluorite from Derbyshire in England. The Ancient Romans believed that drinking alcohol from a cup made of Blue John would allow the drinker to imbibe without becoming drunk.
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