Composition Of Marble Rock

Marble is formed in nature from limestone through the process of metamorphism.

Composition of marble rock. Rocks are rated on the on the moh s hardness scale which rates the rocks on the scale from 1 to 10. 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. 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. 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.

38 42 lime cao 20 25 silica sio2 2 4 alumina al2o3 1 5 2 5 various oxides nao and mgo and 30 32. Streak is the color of rock when it is crushed or powdered. Marble forms under such conditions because the calcite forming the limestone recrystallises forming a denser rock consisting of roughly equigranular calcite crystals. Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism.

Commercially it includes all decorative calcium rich rocks that can be polished as well as certain serpentines verd antiques. Petrographically marbles are massive rather than thin layered and consist of a. The three major classes of rock are igneous sedimentary and metamorphic rock. Marble is a metamorphic rock of calcareous composition and often of a layered structure.

Marble marble is a metamorphic rock formed when limestone is exposed to high temperatures and pressures. Such aggregates constitute the basic unit of which the solid earth is composed and typically form recognizable and mappable volumes. In its pure form marble is a white stone with a crystalline and sugary appearance consisting of calcium carbonate caco 3 usually marble contains other minerals including quartz graphite pyrite and iron oxides these minerals can give marble a pink brown gray green or variegated coloration. The variety of colours exhibited by marble are a consequence of minor amounts of impurities being incorporated with the.

Rocks with hardness 1 3 are soft rocks from 3 6 are medium hardness rocks and 6 10 are hard rocks. Marble is a metamorphic rock formed when limestone is subjected to high pressure or heat. 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. Rock in geology naturally occurring and coherent aggregate of one or more minerals.

Marble is commonly used for sculpture and as a building material. Its essential mineral is recrystallized calcite caco 3. Typically marble is composed of the following major constituents.