Fluorite

CaF₂

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The reference mineral for hardness 4 on the Mohs scale, fluorite is a calcium fluoride (CaF2) celebrated for its wide spectrum of colors, whether purple, blue, green, yellow, pink, or colorless. It crystallizes in the cubic system, most often as cubes or octahedra, with a vitreous luster, a white streak, and perfect octahedral cleavage. Its specific gravity ranges from 3.13 to 3.18. Many specimens glow strongly under ultraviolet light, and the phenomenon of fluorescence was in fact named after this mineral. Fluorite serves as a flux in metallurgy and as a source of fluorine compounds. A specific gravity near 3.15 and only moderate hardness set it apart from the harder, denser minerals it accompanies in veins.

Fluorita é conhecida por sua ampla gama de cores e é o mineral de referência para a dureza 4 na escala de Mohs.

Sistema Cristalino	Cubic (Isometric)
Classe Mineral	03 Halides
Dureza Mohs	4.0
Gravidade Específica	3.13-3.18
Cor	Purple, blue, green, yellow, colorless, pink
Brilho	Vitreous
Traço	White
Clivagem	Perfect octahedral {111}
Fratura	Conchoidal
Transparência	Transparent
Hábito Cristalino	Cubic, octahedral