Granite is a common and widely occurring type of intrusive, felsic and igneous rock. Granite usually has a medium- to coarse grained texture. Occasionally some individual crystals are larger then groundmass, in which case the texture is known as prophylactic. Granites can be white to black in color, depending on their chemistry and mineralogy. By definition, granite is and igneous rock with at least 20% quartz by volume. Granites sometimes occur in circular depressions surrounded by a range of hills, formed by metamorphic aureole or hornfels. Granite is usually founded in the continental plates of the earth's crust.
Granite is nearly always massive, hard and tough, and therefore it has gained widespread use as a construction stone. The average density of granite is between 2.65 and 2.75 g/cm3, its compressive strength usually lies above 200 Mpa and its viscosity at standard temperature and pressure is 3.6 - 1019 Pa.
The word granite comes for the Latin grammar, a grain, in reference to the coarse-grained structure of a crystalline rock.
Marble is a metamorphic rock composed of recrystallized carbonates minerals, mostly commonly Calcite or Dolomite. Geologists used the name marble to refer t metamorphosed limestone.
Marble is commonly used for sculptures and as a building material, mainly for bathrooms and for wall cladding and tiles.
Marble is a rock resulting from metamorphism of sedimentary carbonates rocks, mostly commonly limestone or dolomite rock. Metamorphism caused variable recrystallization of the original carbonate mineral grains.
The resulting marble rock is typically composed of an interlocking mosaic of carbonate crystals. Primary sedimentary textures and structures of the original carbonate rock (protolith) have typically been modified or destroyed.
Pure white marble is the result of metamorphism of a very pure limestone or dolomite protolith. The characteristic swirls and veins of many colored marble varieties are usually due to various mineral impurities such as clay, sand, iron oxides or chert which were originally present as grains or layers in the limestone. These various impurities have been mobilized and recrystallized by the intense pressure and heat of the metamorphism.
Quartz stone is a composite material made of crushed stone bounded together by a polymer resin. It is used primarily for kitchen countertops and wall cladding. Related materials include geopolymers and cast stone. The stone is cast in blocks and cut and polished.
Engineered stone products are gaining in popularity and are sometimes preferred over granite products because engineered stone requires less maintenance. Compared to unsealed granite, it has better resistance to stains. However, recent research reported in a consumer report magazine reveals that there is virtually no difference in performance between quartz products and granite.
Engineered stone is also commonly refer to as aggregate or quartz surface, though it is possible to create solid surface using fillers other than quartz.
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