Allanite
Allanite Definition Allanite is a rare black or brown mineral consisting of the hydrated silicate of calcium, aluminium, iron, cerium, lanthanum, and other rare earth…
Physics
Tanzanite
Tanzanite Definition Tanzanite is the violet to blue form of the mineral zoisite. It is a calcium alumina hydroxy silicate. The gemstone was discovered by…
Zoisite
Zoisite Definition Zoisite is a grayish or whitish mineral occurring in orthorhombic, prismatic crystals, also in columnar masses. It is a silicate of alumina and…
Epidote
Epidote Definition Epidote is a yellowish-green or blackish-green monoclinic mineral. Epidote occurs as formless grains or as prism-shaped crystals, and is found in limestones that…
Lawsonite
Lawsonite Definition Lawsonite is an uncommon mineral that occurs at high pressures and low temperatures in regionally metamorphosed, low-grade, glaucophane-bearing schists. It can also form…
Hemimorphite
Hemimorphite Definition Hemimorphite is a white mineral consisting of hydrated zinc silicate in orthorhombic crystalline form: a common ore of zinc. It is also called…
Mullite
Mullite Definition Mullite is a colourless mineral consisting of aluminium silicate in orthorhombic crystalline form: used as a refractory. It can form two stoichiometric forms…
Phlogopite
Phlogopite Definition Phlogopite is a yellow to dark-brown mica. Phlogopite is monoclinic and is usually found in limestone. It is used in insulation. It is…
About Mica
About Mica Definition Mica: It is any of a group of hydrous aluminosilicate minerals with the general formula (K,Na,Ca)(Mg,Fe,Li,Al)2-3(Al,Si)4O10(OH,F)2 that can be split easily into…
Muscovite
Muscovite Defintion Muscovite is a usually colorless to yellow or pale-gray mica. Muscovite is a monoclinic mineral and is found in igneous rocks, such as…
Biotite
Biotite Definition Biotite is a dark-brown or dark-green to black mica. Biotite is monoclinic and is found in igneous, metamorphic, and sedimentary rocks. It was…
Chamosite
Chamosite Definition Chamosite is a monoclinic-prismatic mineral containing aluminum, hydrogen, iron, magnesium, oxygen, and silicon. It is a member of the Chlorite, and it forms…
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