Marble Rock Composition

Marble is a metamorphic rock composed of recrystallized carbonate minerals most commonly calcite or dolomite marble is typically not foliated although there are exceptions in geology the term marble refers to metamorphosed limestone but its use in stonemasonry more broadly encompasses unmetamorphosed limestone.

Marble rock composition.

It is composed primarily of the mineral calcite caco 3 and usually contains other minerals such as clay minerals micas quartz pyrite iron oxides and graphite under the conditions of metamorphism the calcite in the limestone recrystallizes to form a rock that is. When limestone experiences high heat and pressure beneath the earth it may transform into marble a metamorphic rock. Form of it when limestone buried deep in the older layers of earth s crust is subjected to heat and pressure from thick layers of overlying sediments. Commercially it includes all decorative calcium rich rocks that can be polished as well as certain serpentines verd antiques.

As the rock is subject to natural heat and pressure it recrystallizes growing harder and denser over time. Rocks with hardness 1 3 are soft rocks from 3 6 are medium hardness rocks and 6 10 are hard rocks. The composition of granite and marble consists of mineral content and compound content. Marble forms under such conditions because the calcite forming the limestone recrystallises forming a denser rock consisting of roughly equigranular calcite crystals.

38 42 lime cao 20 25 silica sio2 2 4 alumina al2o3 1 5 2 5 various oxides nao and mgo and 30 32 various carbonates mgco3 and others. Rocks are rated on the on the moh s hardness scale which rates the rocks on the scale from 1 to 10. Petrographically marbles are massive rather than thin layered and consist of a. Marble is a granular metamorphic rock it is derived from limestone or dolomite and it consists of a mass of interlocking grains of calcite or the mineral dolomite.

Limestone a sedimentary rock forms when shells sand and fossils solidify over millions of years. Marble marble is a metamorphic rock formed when limestone is exposed to high temperatures and pressures. The hardness of marble is 3 4 whereas its compressive strength is 115 00 n mm 2. Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism.

Typically marble is composed of the following major constituents. Marble granular limestone or dolomite i e rock composed of calcium magnesium carbonate that has been recrystallized under the influence of heat pressure and aqueous solutions. Marble is a metamorphic rock formed when limestone is subjected to high pressure or heat. The variety of colours exhibited by marble are a consequence of minor amounts of impurities being incorporated with the.

Marble is commonly used for sculpture and as a building material. The life cycle of a rock consists of formation of rock composition of rock and transformation of rock. Streak is the color of rock when it is crushed or powdered.