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Halite (Rock Salt) commonly occurs with other evaporite deposit minerals such as several of the sulfates, halides and borates. Halite crystals form quite rapidly in some fast evaporating lakes resulting in modern artefacts with a coating or encrustation of halite crystals. Halite crystals termed hopper crystals appear to be "skeletons" of the typical cubes, with the edges present and stairstep depressions on, or rather in, each crystal face. In a rapidly crystallizing environment the edges of the cubes simply grow faster than the centers.
NaCl - sodium chloride
Class:
Colorless, white, gray, red, pink, brown, blue
White
Vitreous
Transparent to translucent
2.2
2.5
Perfect
Conchoidal
Cubic crystals, granular, massive; Soluble in water
Non-fluorescent
Frequency:
Abundant
Origin:
Product of high-tempurature fumaroles (Etna, Mt. Vesuvius, Italy); mainly sedinetary, as a result of evaporation of sea water, associated with sylvite, carnallite and other minerals.
Occurence:
Weliczka and Bochnia, Poland; Bernburg, Germany; Austria; California, USA
Application:
Food and chemical industries. Mineral specimen.
Halite Gallery

 
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