Fluorite (Octaedros)

Referência: min-43100-7

Fluorite is formed by hydrothermal fluids and usually occurs in vein systems related to large igneous bodies. It is often associated with sphalerite, galena, barite and quartz, as in the Pennines/England.

It can also occur as a primary mineral in some alkaline igneous rocks, such as syenite pegmatites and carbonatites. Displays a wide variety of colours and may be zoned; very distinctive cubes.

Where: Hydrotermal igneous

Form: common cube crystals, rarely other shapes; also granular.

Colour: variable; colourless, white, green, purple, blue or yellow.

Cleavage: Perfect (octahedral). Lustre: Vitreous. Transparency: Transparent to translucent.

  • Chemical group: Halide
  • Hardness: 4
  • Specific gravity: 3-3.25

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