Marble Rock Appearance

Quartzite and marble may be very similar in appearance but marble is a soft rock which is easily scratched with a needle.

Marble rock appearance.

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. Colour and appearance are their most important qualities. The marble rocks is an area along the narmada river in central india near the city of jabalpur. Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism.

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. Commercially it includes all decorative calcium rich rocks that can be polished as well as certain serpentines verd antiques. 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. Rocks are rated on the on the moh s hardness scale which rates the rocks on the scale from 1 to 10.

Marble is commonly used for sculpture and as a building material. 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. And it also effervesces in dilute hydrochloric acid while quartzite does not react. Streak is the color of rock when it is crushed or powdered.

This rock sample is not marble it is quartzite metamorphosed sandstone. Petrographically marbles are massive rather than thin layered and consist of a. Rocks with hardness 1 3 are soft rocks from 3 6 are medium hardness rocks and 6 10 are hard rocks. 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 marble uses. Marbles are used principally for buildings and monuments interior decoration statuary table tops and novelties. The hardness of marble is 3 4 whereas its compressive strength is 115 00 n mm 2. 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.

In bhedaghat of jabalpur district in the state of madhya pradesh the river has carved the soft marble creating a beautiful gorge of about 8 km in length it is a popular indian tourist destination the local marble is mined and carved into various figures and transported all over india.