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Fluorite

>> Group(s) : halides
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It is known since antiquity, its name comes from the Latin verb "fluere" which means “ to flow “ because it was already used as a flux in metallurgy. The composition evokes the name of this mineral: it contains fluorine, an element which was so named after that of fluorite in which he was identified. It gave its name to fluorescence ... and it also presents the phenomenon of thermoluminescence: when heated, it emits light, a feature that has always made it an amazing stone, even magical ... It may have areas of different color on the inside of a single crystal. the famous murrhine vases were made of it, Pliny named it 'murrhe ". There is a blue-yellow banded variety called " blue John ", in England, which was widely used in the decorative arts until the nineteenth century. It is the standard hardness of 4 on the Mohs hardness scale ranging from 1 to 10.

Exploited sites

This is a very common stone. It is found in France: at Le Beix near Bourg-Lastic, Alban in the Tarn, in the Mont-Blanc in rose octahedrons, Germany, Myanmar, Namibia, China, England (Cumberland), Austria , Switzerland, United States (Illinois), Argentina, Peru, Spain (Berbes, La Collada), Namibia ...

See pictures of the mines / other pictures

Use in jewelry

The gems varieties are cut in strips of two different colors, this is a very fragile collection stone because of its excessively easy cleavage and low hardness.
Banded varieties are used to make decorative objects and even architecture as the green balustrades at the Paris Opera.
In Asia, well colored and transparent varieties are skillfully cut into vases, snuff boxes, and animal sculptures.
The green fluorite has been called "emerald of Africa" : this appellation is prohibited in jewelry.

Daily care and precautions

Very fragile, it cleaves spontaneously to heat or shock. A crystal exposed to hot sun can cleave spontaneously if a sudden temperature change occurs, as if put in cold water. Some lose their intensity or change color in the sun ... that they sometimes get back after staying for a while in the dark.

Looking alike stones

aragonite , baryte , calcite , gypsum , magnesite

Historical healing properties

It would be an energy stone, that of order, which easily transmits its energy both mentally and physically by providing wisdom, harmony and ponder. It would give confidence, would help positive thinking. In ancient times it was accredited the power to discern truth. Blue fluorite would help to understand complex situations and resolve them. Its many cleavages produce perfect geometric shapes and the make of it the stone of ordered construction for architects, it is credited with the ability to help the careless to become ordered! The corresponding signs are : to the colorless fluorite, Taurus and Libra, to the blue: Cancer and Capricorn, for yellow: Sagittarius and for the green: Virgo and Gemini.

Imitations and treatments

We know how to synthesize fluorite, an X-ray irradiation causes color changes.

Chemical characteristics
Ca F2

calcium fluorure

Physical characteristics

Main color : silvery

Other colors : white, blue, grey, colourless, yellow, orange, pink, red, green, purple

all the existing colors

Color of streak : white

Luster : vitreous

Hardness : 4.0

Density : 3.00 to 3.25

Cleavage : perfect

Fracture : uneven

very easy cleavage in all 3 dimensions

Optical properties

Transparency : transparent

Refractive Index : 1.430 - 1.450

Double refraction : 0.000

None, isotropic

visible double refraction : no

Dispersion : 0,007 (0.004)

Pleochroism : absent

Number of colors : 1

Absorption spectrum : 634 - 610 - 582 - 445 - 427

For the green one

Fluorescence : variable

It can only be fluorescent, colors vary according to the origin and can be spectacular

Crystals

In cubes, perfect octahedra. Sometimes compact, banded, scalloped.

cristaux

Crystal system : cubic

Other informations

Astrological sign : Taurus, Gemini

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Correspondance
astrological
  • Taurus Taurus
  • Gemini Gemini

It promotes a good energy level mainly in Pisces and Aquarians.