1) Aluminous mineral 2) Amphibole 3) Green to black mineral 4) Iron mineral
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1) Uralite
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https://www.crosswordclues.com/clue/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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http://en.wikipedia.org/wiki/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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http://thinkexist.com/dictionary/meaning/hornblende/
A rock forming amphibole group mineral which forms part of the mafic component of igneous rocks.
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http://www.australian-shares.com/glossary-of-terms.php.html
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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http://www.britannica.com/eb/a-z/h/70
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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http://www.daviddarling.info/encyclopedia/H/hornblende.html
<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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http://www.encyclo.co.uk/local/20973
A group of mineral including calcium, iron, magnesium, and aluminum silicates.
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http://www.encyclo.co.uk/local/22192
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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http://www.encyclo.co.uk/webster/H/61
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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http://www.evcforum.net/WebPages/Glossary_Geology.html
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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http://www.probertencyclopaedia.com/browse/HH.HTM
A group of minerals including calcium, iron, magnesium, and aluminum silicates. May be present in igneous stones.
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[
n] - a green to black mineral of the amphibole group
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http://www.webdictionary.co.uk/definition.php?query=hornblende
See under soil type. Floor type Next to climate and grape variety, one of the most important factors influencing the quality of wine. The different soil types have developed over millions of years through physical and chemical weathering of rocks and through humification of organic matter. During physical weathering, natural forces such as win...
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https://glossary.wein.plus/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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https://www.encyclo.co.uk/local/21221
a dark-green to black mineral of the amphibole group, calcium magnesium iron and hydroxyl aluminosilicate.
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https://www.infoplease.com/dictionary/hornblende
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