A crystalline, granular rock, consisting of quartz, feldspar, and mica, and usually of a whitish, grayish, or flesh-red color. It differs from gneiss in not having the mica in planes, and therefore in being destitute of a schistose structure.
A light colored igneous rock comprised of the silicon and aluminum-rich minerals quartz and feldspar. Granites are the most abundant igneous rock that form by crystallization of magma within continental crust.
A light coloured, course-grained, igneous rock.
It is a term given to fine to coarse-grained, igneous rock formed by volcanic action which consists of quartz, feldspar, and mica, with accessory minerals.
A granular igneous rock composed essentially of quartz, feldspar, and mica. The feldspar is generally the variety containing potassium (orthoclase and microcline) but some limesoda feldspar may be present. Hornblende, apatite, zircon, and magnetite are usually present in minor amounts.
an intrusive (plutonic) igneous rock of hig silica (SiO2) content typical of continental regions.
A fine to course-grained, igneous rock formed by volcanic action consisting of quartz, feldspar, and mica, with accessory minerals.
A coarse-grained, intrusive igneous rock composed primarily of light colored minerals such as quartz, orthoclase, sodium plagioclase and muscovite mica. Granite is thought to be one of the main components of continental crust.
A coarse-grained igneous rock composed of K-feldspar, plagioclase, and quartz, with small amounts of mafic minerals.
a course grained rock composed of a variety of minerals.
Intrusive whitish igneous rock composed of quartz and feldspars.
a visibly granular, crystalline rock of predominantly interlocking texture, composed essentially of alkalic feldspars and quartz; this is true granite. Feldspar is generally present in excess of quartz, and accessory minerals (chiefly micas, hornblende, or more rarely pyroxene) are commonly present. The alkalic feldspars may be present (1) as individual mineral species (2) as isomorphous or mechanical intergrowths with each other or (3) as chemical intergrowths with the lime feldspar molecule, but 80 + 3% of the feldspar must be composed of the potash or soda feldspar molecules. [Go to source
a term that includes granite (as defined above), gneiss, gneissic granite, granite gneiss, and the rock species known to petrologists as syenite, monzonite, and granodiorite, species intermediate between them, the gneissic varieties and gneisses of corresponding mineralogic compositions and the mineralogic compositions and the corresponding varieties of porphyritic textures. The term commercial granite shall also include other feldspatic crystalline rocks of similar textures, containing minor amounts of accessory minerals, used for special decorative purposes, and known to petrologists as anorthosite and laurvikite. [Go to source
A rock composed of mica, feldspar, and quartz with a thoroughly crystalline, granular texture.
Light-colored, medium- to very coarse-grained intrusive igneous rock, commonly massive-appearing, lacking layering or banding; composed of quartz, feldspar, and commonly muscovite mica with minor amounts of dark minerals. Granite and granitic gneiss were quarried for use as dimension stone. Very limited quarrying continues.
A rock consisting essentially of crystals of felspar and mica in a mass of quartz. 89
A common igneous rock that crystallizes slowly, within the earth, so that mineral crystals have time to grow to relatively large size. Granites are usually low in iron-magnesium minerals and contain abundant quartz and feldspar.
Granite is coarse-grained, plutonic igneous rock, typically rich in quartz and feldspars.
A coarse-grained, felsic, plutonic igneous composed of K-feldspar as well as quartz, plagioclase feldspar, and in lesser amounts, mica and amphibole.
A felsic, coarse-grained, intrusive igneous rock composed of quartz, orthoclase feldspar, sodium-rich plagioclase feldspar, and micas. Also sometimes a metamorphic product. (Compare Rhyolite.)
Light coloured, coarse grained plutonic rock with free quartz. Usually composed of potassium feldspar, quartz and mica.
intrusive felsic rock identifiable in its coarse quartz and potassic feldspar.
A type of stone formed by the slow cooling or crystallization of melted rock. The three main components of granite are feldspar, quartz and mica. Feldspar has several different colors or forms, and is primarily responsible for the apparent over-all color of the granite. Quartz is clear and appears to take color from the feldspar and mica around it. Mica shows as black flecks and makes up less than 20 % of the components of a granite.
plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz
Medium to coarse grained acidic igneous rock that is rich in quartz and potassium feldspar. Derived from felsic magma.
An igneous rock of visible crystalline formation that is formed by magma cooling slowly, deep below the earths crust. Usually found in shades of whitish grey but potash feldspar can give it a red or pinkish hue. It is the most common intrusive rock exposed on the earth's surface.
Igneous rocks that were formed by slowly cooling pockets of magma that were trapped beneath the earth's surface.
A granular, crystalline rock of quartz, felspar and mica.
Rock. A light-colored, coarse-grained crystalline igneous rock composed of quartz, feldspar, and micas. Granite forms when magma cools slowly far beneath the ground surface.
A hard rock comprised of quartz and mica, commonly used on tabletops and counters
An igneous rock that is speckled with colors of gray, black pink and clear, and is one of the hardest stones used in buildings
An unstratified igneous rock composed of coarse grains or crystals of quartz, feldspar, mica and sometimes hornblende.
Granite is a form of Igneous Rock, created by the cooling of molten magma. This is a luxury floor covering as it is an expensive product. The floor structure needs consideration, as it is very heavy. It is hardwearing and resistant to chemicals. It has a timeless look. If highly polished it is slippery, but a honed finish provides a more manageable finish. It comes in limited colours â€“ black, red, green, grey, blue, pink.
A hard rock consisting chiefly of feldspar and quartz.
a plutonic igneous rock, medium to coarse grained in texture containing the minerals quartz, alkali feldspar, biotite and hornblende. Granite forms by the cooling of magma deep in the Earth's crust.
A coarse grained igneous rock composed of quartz (over 20%) and feldspar in which plagioclase and alkali feldspar occur in approximately equal proportions. A series of granite masses occur forming the "spine" of south-west England ranging from the Isles of Scilly in the West to Dartmoor in the east. Two important granites are present around the Fal Estuary - the Carnmenellis Granite and the St. Austell Granite.
a hard, coarse grained igneous rock
Geologically, igneous rock with crystals or grains of visible size consisting mainly of quartz and the sodium or potassium feldspar. In building stone and gravestones, crystalline silicate rock with visible grains. The commercial term includes gneiss and igneous rocks that are not granite in the strictest sense.
a light-coloured, coarse-grained, igneous rock, consisting of quartz, alkali feldspar, micas and other associated/accessory minerals.
Coarse-grained igneous rock usually without obvious bands or markings.
A coarse-grained intrusive igneous rock with at least 65% silica. Quartz, plagioclase feldspar and potassium feldspar make up most of the rock and give it a fairly light color. Granite has more potassium feldspar than plagioclase feldspar. Usually with biotite, but also may have hornblende. more details...
a hard, grey, igneous rock.
A fine to coarse-grained, igneous rock formed by volcanic action and consisting of quartz, feldspar, mica, and accessory minerals. Granite-type rocks include those of similar texture and origin.
A light-colored, coarsely-crystalline, intrusive igneous rock (Image). It is rich in silicon and aluminum. Often forms stocks or batholiths which may be sources of copper or gold and silver (Image).
A fine to course grained igneous rock, generally consisting of quartz, feldspar and rock, formed by volcanic action and cooled slowly under great pressure. It is the hardest building stone with a very dense grain. Example: Granite Boulders
This igneous metamorphic stone originates from volcanic activity, and is typically course-grained. It varies in color from very light to black, and the quartz and feldspar crystals it contains give the stone a reflective quality. Classified as a #8 on a standard scale of hardness (a diamond is a #10), this indicates that granite is an extremely difficult stone to carve, but it is still a popular medium for sculpture because of its durability. The surface can be smoothed to a high polish.
a light or speckled, coarse-grained igneous rock composed of quartz, feldspar, and mica
an igneous rock that consists of feldspar and quartz.
A term applied to quartz-bearing rocks formed deep below the earth's surface.
light-coloured, coarse-grained felsic igneous intrusive rock composed of quartz, feldspar and ferromagnesium minerals such as mica and hornblende; it is the intrusive equivalent of rhyolite.
A pink-colored, felsic, plutonic rock that contains potassium and usually sodium feldspars, and has a quartz content of about 10%. Granite is commonly found on continents but virtually absent from the ocean basins. A coarse-grained, intrusive igneous rock composed of quartz, orthoclase feldspar, sodic plagioclase feldspar, and micas. Also sometimes a metamorphic product.
a coarse-grained, felsic (light-colored) igneous rock composed of ortho-clase, quartz, and sodium-rich plagioclase, often with biotite.
A coarse grained igneous rock containing the minerals mica, quartz and feldspar. Granite forms from the solidification of magma deep below the Earth's surface. The magma cools very slowly, allowing big crystals to be formed.
A slowly cooled, light-coloured crystalline rock made up mainly of crystals of feldspar and quartz. Granite is the coarsegrained equivalent of volcanic rocks like dacite or rhyolite.
A granular igneous rock composed chiefly of felspar (orthoclase) and quartz, usually with one or more other minerals, as mica, hornblende, etc.
highly felsic igneous plutonic rock, typically light in color; rough plutonic equivalent of rhyolite. Granodiorite - igneous plutonic rock, less felsic than granite, typically light in color; rough plutonic equivalent of dacite.
A coarse-grained intrusive igneous rock consisting of quartz, feldspar and mica.
Igneous stone composed of quartz with orthoclase feldspar, mica, hornblende and other minerals. A very dense and durable building stone.
a light colored, often coarse grained igneous rock of high silica composition
A coarse grained acid igneous rock. The crystals are large as a result of the magma cooling and crystallising slowly deep underground.
Granite is a type of igneous rock (volcanic rock that has cooled) that is light-colored and coarse grained. Granite is characterized by the minerals orthoclase and quartz with some plagioclase feldspar and iron-magnesium minerals. Granite underlies much of the continents.
1. In technical geologic terms, igneous rock with crystals or grains of visible size and consisting mainly of quartz and the sodium or potassium feldspars. 2. In building stone, crystalline silicate rock with visible grains. The commercial term includes gneiss (a metamor phic rock) and igneous rocks that are not granite in strict sense.
A quartz-based stone with a tough, glossy appearance; granite is harder than marble.
Orthoclase feldspar greater than 2/3 total feldspar, quartz greater than 10
a light-coloured intrusive igneous rock made up of the minerals quartz and feldspar with biotite and / or muscovite mica. The crystals are big enough to be visible without magnification. Granite is formed from the melting of the continental crust rocks.
Highly felsic igneous plutonic rock, typically light in color; rough plutonic equivalent of rhyolite. Granite is actually quite rare in the U.S.; often the term is applied to any quartz-bearing plutonic rock.
granular plutonic, leucocratic rock composed of quartz, feldspatrs, micas.
A common igneous rock composed of quartz, orthoclase, and hornblende, often accompanied by pyroxene or mica. It is called granite because of the granular surface. Granite is frequently used for buildings and monuments.
coarse grained igneous rock always containing Quartz and Feldspar.
a light-colored, coarse-grained, igneous rock formed from magma that cooled below Earth's surface.
A rock consisting essentially of crystal of felspar and mica in a mass of quarts.
A common, hard, coarse-grained rock that makes up most of the continental plates. Go back to the top of this page. H - M
Author: C. Graham A coarse-grained igneous rock composed of 20% quartz and feldspar.
A plutonic rock in which quartz constitutes 10 to 50 percent of the felsic components and in which the alkali feldspar/total feldspar ratio is generally restricted to the range of 65 to 90 percent.
An igneous rock, most often pink, red or black, often with crystalline deposits. Common in Ontario.
a very hard rock
Coarse-grained igneous rock composing mainly quartz, feldspar, and mica.
An intrusive rock dominated by quartz (10-50%)and alkali feldspar
A medium to coarse grained plutonic igneous rock usually light coloured and consisting largely of quartz and feldspar;
Igneous rock composed predominantly of visible grains of feldspar and quartz. Used in building.
Acidic, plutonic igneous rock comprising feldspars, micas and quartz.
A hard, crystalline rock formed from magma (molten rock).
A light-colored, coarse-grained igneous rock formed by cooling of silica-rich magma below the surface of the earth. Granite is considered to be the average composition of the continental crust of the earth.
a plutonic igneous rock consisting chiefly of quartz and feldspar, and usually also containing biotite. [AHDOS
An igneous rock that contains quartz, feldspar and varying amounts of biotite and muscovite.
A light-colored coarse-grained, igneous rock containing the minerals quartz and orthoclase feldspar, with lesser amounts of plagioclase feldspar, mica, and hornblende.
Granite (IPA: ) is a common and widely occurring type of intrusive, felsic, igneous rock.