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Pink Fluorite Specimen 1

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Original price $700
Current price $650

Gemini Pink Fluorite Specimen with nice deep color and perfect termination.

Dimensions (length, width, height): 9.2cm x 6.7cm x 5.2cm

Weight: 330 grams

Origin: Nagar Mine. Hunza valley, Gilgit, Pakistan.

Color:  Pink


Smooth and nice Fluorite Specimen with deep pink color.

 

 

 

 

FLUORITE:

Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF2. It belongs to the halide minerals. It crystallizes in isometric cubic habit, although octahedral and more complex isometric forms are not uncommon. Pure fluorite is transparent, both in visible and ultraviolet light, but impurities usually make it a colorful mineral and the stone has ornamental and lapidary uses. Industrially, fluorite is used as a flux for smelting, and in the production of certain glasses and enamels. The purest grades of fluorite are a source of fluoride for hydrofluoric acid manufacture, which is the intermediate source of most fluorine-containing fine chemicals. Optically clear transparent fluorite lenses have low dispersion, so lenses made from it exhibit less chromatic aberration, making them valuable in microscopes and telescopes. Fluorite optics are also usable in the far-ultraviolet and mid-infrared ranges, where conventional glasses are too absorbent for use.

The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 4 as Fluorite.

Color

Fluorite is allochromatic, meaning that it can be tinted with elemental impurities. Fluorite comes in a wide range of colors and has consequently been dubbed "the most colorful mineral in the world". Every color of the rainbow in various shades is represented by fluorite samples, along with white, black, and clear crystals. The most common colors are purple, blue, green, yellow, or colorless. Less common are pink, red, white, brown, and black. Color zoning or banding is commonly present. The color of the fluorite is determined by factors including impurities, exposure to radiation, and the absence of voids of the color centers.

Uses

Natural fluorite mineral has ornamental and lapidary uses. Fluorite may be drilled into beads and used in jewelry, although due to its relative softness it is not widely used as a semiprecious stone.

It is also used for ornamental carvings, with expert carvings taking advantage of the stone's zonation.

In the laboratory, calcium fluoride is commonly used as a window material for both infrared and ultraviolet wavelengths, since it is transparent in these regions (about 0.15 µm to 9 µm) and exhibits an extremely low change in refractive index with wavelength.

In 2012, the first source of naturally occurring fluorine gas was found in fluorite mines in Bavaria, Germany. It was previously thought that fluorine gas did not occur naturally because it is so reactive and would rapidly react with other chemicals.

 

General

Category

Halide mineral

Formula

CaF2

Strunz classification

3.AB.25

Crystal system

Isometric

Crystal class

Hexoctahedral (m3m)
H–M symbol: (4/m 3 2/m)
(cF12)

Space group

Fm3m (No. 225)

Unit cell

a = 5.4626 Å; Z = 4

Identification

Color

Colorless, although samples are often deeply colored owing to impurities; Purple, lilac, golden-yellow, green, blue, pink, champagne, brown.

Crystal habit

Well-formed coarse sized crystals; also nodular, botryoidal, rarely columnar or fibrous; granular, massive

Twinning

Common on {111}, interpenetrant, flattened

Cleavage

Octahedral, perfect on {111}, parting on {011}

Fracture

Subconchoidal to uneven

Tenacity

Brittle

Mohs scale hardness

4 (defining mineral)

Luster

Vitreous

Streak

White

Diaphaneity

Transparent to translucent

Specific gravity

3.175–3.184; to 3.56 if high in rare-earth elements

Optical properties

Isotropic; weak anomalous anisotropism

Refractive index

1.433–1.448

Fusibility

3

Solubility

slightly water soluble and in hot hydrochloric acid

Other characteristics

May be fluorescent, phosphorescent, thermoluminescent, and/or triboluminescent