Mineral
Fuchsite
Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Hardness 2-2.5 on Mohs scale, distinct green color due to chromium, pearly to vitreous luster, monoclinic crystal structure, perfect basal cleavage, specific gravity of 2.7-3.0.
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Physical properties
Hardness 2-2.5 on Mohs scale, distinct green color due to chromium, pearly to vitreous luster, monoclinic crystal structure, perfect basal cleavage, specific gravity of 2.7-3.0.
Formation & geological history
Forms in metamorphic rocks, particularly phyllites and schists, often associated with other chromium-bearing minerals.
Uses & applications
Used primarily as an ornamental stone or a collector's specimen. Sometimes used in carvings or jewelry, though it is quite soft.
Geological facts
Fuchsite is the green, chromium-rich variety of muscovite mica. High-quality pieces can exhibit a beautiful sparkle.
Field identification & locations
Identified by its distinctive pale to emerald green color and micaceous, flaky texture. Often found in regions with significant metamorphic history, such as Brazil, India, and parts of the United States.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock