Composition Of Marble Rock

Rock in geology naturally occurring and coherent aggregate of one or more minerals.

Composition of marble rock.

Rocks with hardness 1 3 are soft rocks from 3 6 are medium hardness rocks and 6 10 are hard rocks. 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. Such aggregates constitute the basic unit of which the solid earth is composed and typically form recognizable and mappable volumes. Rocks are rated on the on the moh s hardness scale which rates the rocks on the scale from 1 to 10.

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. The exact chemical composition of marble will greatly vary dependong on the location and the minerals or impurities present in the limestone during recrystallization. The hardness of marble is 3 4 whereas its compressive strength is 115 00 n mm 2. 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.

Its essential mineral is recrystallized calcite caco 3. Marble forms under such conditions because the calcite forming the limestone recrystallises forming a denser rock consisting of roughly equigranular calcite crystals. Marble is formed in nature from limestone through the process of metamorphism. 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 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. The three major classes of rock are igneous sedimentary and metamorphic rock. 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. Marble marble is a metamorphic rock formed when limestone is exposed to high temperatures and pressures.

Petrographically marbles are massive rather than thin layered and consist of a. Typically marble is composed of the following major constituents. The variety of colours exhibited by marble are a consequence of minor amounts of impurities being incorporated with the. Commercially it includes all decorative calcium rich rocks that can be polished as well as certain serpentines verd antiques.

Streak is the color of rock when it is crushed or powdered. 38 42 lime cao 20 25 silica sio2 2 4 alumina al2o3 1 5 2 5 various oxides nao and mgo and 30 32. Marble is commonly used for sculpture and as a building material.