Furthermore, this cleavage forms remarkably thin sheets or lamellae , which are often highly elastic. The crystal system of this mineral is monoclinic. Usually, it is white or colourless, but it can also have tint such as grey, brown, green, etc. The green colour mineral is rich in chromium. The mineral is either transparent or translucent. Moreover, it has high birefringence, and it is anisotropic as well.
The fracture of muscovite is micaceous. We can describe its tenacity as elastic tenacity. It has a vitreous lustre, and the mineral streak is white.
Furthermore, muscovite is important as a component in manufacturing fireproofing materials, insulating materials, as a lubricant, etc. Biotite is a phyllosilicate mineral that mainly contains magnesium and potassium. Also, this is a sheet silicate. The sheets weakly bind to each other via potassium ions. Micas: Muscovite and Biotite The mica minerals have one perfect cleavage that allows them to be broken into very thin sheets. This is very distinctive. Muscovite is clear, silvery, or coppery silver in color depending on the thickness of the sample and presence of impurities whereas fresh biotite is black.
When biotite weathers, it can become dark golden or coppery in color. People have found golden flakes of weathered biotite in sand and, as with fool's gold pyrite , thought that this was real gold. This silvery clear color is characteristic of thin sheets of muscovite. However, Muscovite Mica is normally very light in colour or even colorless. All Rights Reserved Sitemap Powered by. Muscovite Mica. Phlogopite Mica. Sericite Mica. Biotite Mica. Synthetic Mica.
Dehydrated Mica. Mica Flake. Mica Sheet.
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