mineral
Potash (Sylvite/Potassium Feldspar)
Potassium chloride (KCl) or Orthoclase (KAlSi3O8)
Hardness: 2-6 depending on exact mineral type; Color: reddish-pink to orange; Luster: vitreous (glassy); Crystal structure: cubic or monoclinic; Cleavage: excellent in two directions
- Hardness
- 2-6 depending on exact mineral type
- Color
- reddish-pink to orange
- Luster
- vitreous (glassy)
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Physical properties
Hardness: 2-6 depending on exact mineral type; Color: reddish-pink to orange; Luster: vitreous (glassy); Crystal structure: cubic or monoclinic; Cleavage: excellent in two directions
Formation & geological history
Commonly formed in evaporite deposits from ancient seas (if Sylvite) or as a major constituent of igneous rocks like granite (if Feldspar).
Uses & applications
Primarily used in agriculture as fertilizer (potash), glassmaking, ceramics, and occasionally as a display mineral for collectors.
Geological facts
The name 'Potash' comes from 'pot ash', referring to the historical method of plant ashes soaked in water in a pot. It is a vital nutrient for plant growth.
Field identification & locations
Identify by the pink/orange color and distinctive step-like cleavage planes. Common in areas with ancient salt beds like Saskatchewan, Canada, or Permian basins in New Mexico/Texas.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous