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Calcite vs. Quartz — What's the Difference?

Calcite vs. Quartz

Difference Between Calcite and Quartz

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Calcite

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 3 as "calcite".
Sep 23, 2021

Quartz

Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2.
Sep 23, 2021

Calcite

A common crystalline form of natural calcium carbonate, CaCO3, that is the basic constituent of limestone, marble, and chalk. Also called calcspar.
Sep 23, 2021

Quartz

A very hard mineral composed of silica, SiO2, found worldwide in many different types of rocks, including sandstone and granite. Varieties of quartz include agate, chalcedony, chert, flint, opal, and rock crystal.
Sep 23, 2021

Calcite

(mineral) a very widely distributed crystalline form of calcium carbonate, CaCO3, found as limestone, chalk and marble
Sep 23, 2021
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Quartz

(mineral) The most abundant mineral on the earth's surface, of chemical composition silicon dioxide, SiO2. It occurs in a variety of forms, both crystalline and amorphous. Found in every environment.
Sep 23, 2021

Calcite

Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar.
Sep 23, 2021

Quartz

Crystal meth: methamphetamine hydrochloride.
Sep 23, 2021

Calcite

A common mineral consisting of crystallized calcium carbonate; a major constituent of limestone
Sep 23, 2021

Quartz

A form of silica, or silicon dioxide (SiO2), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in cryptocrystalline massive forms varying in color and degree of transparency, being sometimes opaque.
Sep 23, 2021

Quartz

Colorless glass made of almost pure silica
Sep 23, 2021

Quartz

A hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities
Sep 23, 2021

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