Hornblende

Hornblende is a complex inosilicate series of minerals (ferrohornblende – magnesiohornblende). It is not a recognized mineral in its own right, but the name is used as a general or field term, to refer to a dark amphibole. Hornblende is an isomorphous mixture of three molecules; a calcium-iron-magnesium silicate, an aluminium-iron-magnesium sili...
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Hornblende

• (n.) The common black, or dark green or brown, variety of amphibole. (See Amphibole.) It belongs to the aluminous division of the species, and is also characterized by its containing considerable iron. Also used as a general term to include the whole species.
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hornblende

<chemical> The common black, or dark green or brown, variety of amphibole. (See Amphibole) It belongs to the aluminous division of the species, and is also characterised by its containing considerable iron. Also used as a general term to include the whole species. ... <geology> Hornblende schist, a hornblende rock of schistose structure...
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Hornblende

Horn'blende` noun [ G., from horn horn + blende blende.] (Min.) The common black, or dark green or brown, variety of amphibole. (See Amphibole .) It belongs to the aluminous division of the species, and is also characterized by its containing considerable iron. Also used as a...
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hornblende

A common, greenish-black to black amphibole mineral, essentially calcium magnesium iron sodium aluminum aluminosilicate, which is found in igneous and metamorphic rock. Hornblende has a hardness on Mohs scale and a relative density of 3.2.
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Hornblende

A group of mineral including calcium, iron, magnesium, and aluminum silicates.
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Hornblende

A group of minerals including calcium, iron, magnesium, and aluminum silicates. May be present in igneous stones.
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Hornblende

A rock forming amphibole group mineral which forms part of the mafic component of igneous rocks.
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Hornblende

A variety of the amphibole mineral group. hornfels A nonfoliated metamorphic rock of uniform grain size, formed by high-temperature metamorphism. Hornfelses typically are formed by contact metamorphism around igneous intrusions.
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hornblende

calcium-rich amphibole mineral that is monoclinic in crystal structure. Hornblende`s generalized chemical formula is (Ca,Na)2(Mg,Fe,Al)5(Al,Si)8O22 ... [7 related articles]
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hornblende

Green or black rock-forming mineral, one of the amphiboles. It is a hydrous silicate composed mainly of calcium, iron, magnesium, and aluminium in addition to the silicon and oxygen that are common to all silicates. Hornblende is found in both igneous and metamorphic rocks and can be recognized by its colour and prismatic shape
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Hornblende

Hornblende is a common member of the amphibole group. It can be told from pyroxene by cleavage and is found in igneous and metamorphic rocks, including often granite. It has the formulae (Ca,Na)2-3(Mg,Fe,Al)5(Al,Si)8O22(OH) 2 and a relative hardness of 6.
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hornblende

hornblende: see amphibole.
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hornblende

See below soil type,
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hornblende

[n] - a green to black mineral of the amphibole group
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