hornblend (amfibol grubuna ait bir mineral)

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hornblende
an important rock-forming mineral made chiefly of Silicates of Magnesium, Calcium and Iron, black in colour
A green to black amphibole mineral, of complex structure, formed in the late stages of cooling in igneous rock
See Amphibole
A mineral that is the common dark variety of aluminous amphibole
a green to black mineral of the amphibole group; consists of silicates of calcium and sodium and magnesium and iron
{i} (Geology) variety of igneous rock, common dark-colored silicate mineral from the amphibole group; amphibole, any of several varieties of ferromagnesian silicate minerals
Also used as a general term to include the whole species
A black prismatic rock-forming mineral, the most common of the amphibole group It has a variable composition consisting of chiefly sodium, iron, magnesium, aluminum, and silica
It belongs to the aluminous division of the species, and is also characterized by its containing considerable iron
Any of a subgroup of amphibole minerals that are calcium-iron-magnesium-rich and monoclinic in crystal structure. Hornblende, whose generalized chemical formula is (Ca,Na)2(Mg,Fe,Al)5(Al,Si)8O22(OH)2, occurs widely in metamorphic and igneous rocks. Common hornblende is dark green to black in colour and usually found in middle-grade metamorphic rocks (formed under medium conditions of temperature and pressure). Such metamorphic rocks with abundant hornblende are called amphibolites
A variety of the amphibole mineral group
The common black, or dark green or brown, variety of amphibole