Group: Silicates- Phyllosilicates
Crystal System: Monoclinic
Color: Light to medium green
Form/Habit: Curved Aggregates
Hardness: 2 1/2
Specific Gravity: 2.8 -2.9
Cleavage: Perfect Basal
Luster: Vitreous to pearly
Transparency: Transparent to opaque
Fuchsite which is also commonly known as chrome mica, is a rich variety of the mineral muscovite, that belongs to the mica group of phyllosilicates minerals. Chrominum generally replaces on the aluminum (Al) atoms in the general muscovite formula, and produces a light green color which is how Fuchsite is recognized. Fuchsite is typically found within minute type micaceous aggerates, with individual plates that are barely invisible. and is a major mineral of chromium rich phyletic rocks of the greenschist facies. It generally occurs in the monoclinic crystal system, which its color is a pale green.to emerald green that depends on the amount of Cr concentration, that may be up to 25%.
The mineral Fuchsite is generally found in concentric, curved, aggregate, and as flakes that resemble mica, and its perfect cleavage typically leads thin, flexible plates. Fuchsite is typically a mineral that associated with hydrothermal solutions that have replaced carbonates in gold deposits, and in metamorphic rocks in corundum, and staurolite schist. Some of the places its commonly found includes Quadville, Timmins, and other parts of Canada such as Manitoba.
Fuchsite is typically associated with two other minerals as its part of the muscovite mica group, and is commonly found in Aventurine. Muscovite is generally found within metamorphic rocks that includes gneisses, schists, and even granites. It may also be found in some fine grained sediments, and is typically considered as good electrical and thermal insulator due to the low presence of iron concentrations within it. Another mineral which can also have concentration of fuchsite includes Glaucophane, which is an inosilicate mineral. Glaucophane is a mineral that typically is known to occur in schists that are formed by high pressure metamorphism of sodium-rich sediments at low tempreatures that are up to 400 F/200 C. or by introduction of sodium into the process.