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Granite (/ ˈ ɡ r æ n ɪ t / GRAN-it) is a coarse-grained intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous ...
This is a list of minerals which have Wikipedia articles. Minerals are distinguished by various chemical and physical properties. Differences in chemical composition and crystal structure distinguish the various species .
Monzogranite – Biotite granite rocks that are considered to be the final fractionation product of magma – A silica-undersaturated granite with <5% normative quartz; Monzonite – Igneous intrusive rock with low quartz and equal plagioclase and alkali feldspar – a plutonic rock with <5% normative quartz
List of U.S. state minerals, rocks, stones and gemstones. 8 languages. ... Granite (1985); New Hampshire's nickname is the Granite State: Smoky quartz (1985) New ...
The granite of the dimension-stone industry along with truly granitic rock also includes gneiss, gabbro, anorthosite and even some sedimentary rocks. Natural stone is used as architectural stone (construction, flooring, cladding, counter tops, curbing, etc.) and as raw block and monument stone for the funerary trade.
Sillimanite is considered a diagnostic mineral for peraluminous S-type granites. Figure 4a and 4b, show the mineral cordierite, which is also considered to be a diagnostic mineral for peraluminous S-type granites in the Strathbogie Granite (sample CV-142). Subhedral cordierite phenocryst shown here is colorless in plane polarized light, but can ...
Pegmatitic granite with pink potassium feldspar crystals, surrounding a finer-grained cumulate-filled enclave, Rock Creek Canyon, eastern Sierra Nevada, California. Most pegmatites have a simple composition, often being composed entirely of minerals common in granite, such as feldspar, mica, and quartz. [3]
Some minerals made into gemstones may display a chatoyancy or cat's eye effect, ... This is a list of gemstones, organized by species and types. Minerals