Monoclinic System
A crystal system which consists of three axes, each unequal in length with two intersecting at oblique angles and the third perpendicular to the other two.
Mounting
The portion of a piece of jewelry which holds a gemstone.
Part 7: The Monoclinic System
Having dispensed with the hexagonal system in article 6, we are ready to resume our task of the removal of symmetry from 3-axis systems.
It commonly forms small flattened or elongated crystals (monoclinic system) that are a resinous, reddish to yellowish brown. Hardness is 5 -5.5, streak is white, and specific gravity is 4.6-5.4.
Epidote is a calcium aluminium iron sorosilicate mineral, Ca2(Al, Fe)3(SiO4)3(OH), crystallizing in the monoclinic system.
Monoclinic System
Triclinic System
The above seven crystal systems are listed in order of their decreasing symmetry.
Crystals that form in the monoclinic system have three unequal axes. The (a) and (c) crystallographic axes are inclined toward each other at an oblique angle, and the (b) axis is perpendicular to a and c.
chrysoberyl, peridot, topaz
Monoclinic systems
3 crystallographic axes of different lengths, 2 at right angles to each other, the third at a different angle
1 ...
8) Yes, chalcedony (as an aggregate) gives an AGG reaction (always light) to the polariscope test, while moonstone (being a crystalline gem of the monoclinic system) tests DR (blinks light and dark when turned). ...
Within each of the systems, the cyrstals can mineralize into different crystal habits (form). The seven crystal systems are: cubic systems, tetragonal systems, hexagonal systems, trigonal systems, orthorhombic systems, monoclinic systems, ...
The seven crystal systems are: cubic systems, tetragonal systems, hexagonal systems, trigonal systems, orthorhombic systems, monoclinic systems, and triclinic systems. For more information on crystal systems, click here.
Mineral species which adhere to the monoclinic crystal system include pyroxene, amphibole, orthoclase, azurite, and malachite, among many others. The minerals of the monoclinic system tend to produce long prisms.
 See also: Monoclinic, Crystal, Crystals, Faces, Mineral
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