The true marble is crystalline limestone that is characterized with diverse proportions of dolomite.
Chemical composition of marble and granite.
Other common minerals include mica muscovite and biotite and hornblende see amphibole.
It consists of coarse grains of quartz 10 50 potassium feldspar and sodium feldspar.
Typically marble is composed of the following major constituents.
The chemical composition of granite is typically 70 77 silica 11 13 alumina 3 5 potassium oxide 3 5 soda 1 lime 2 3 total iron and less than 1 magnesia and titania.
Accessory minerals of granite.
70 18 silicon dioxide sio2 14 47 aluminum oxide al2o3 4 11 potassium oxide k2o 3 48 sodium oxide na2o 1 99 calcium oxide cao 1 78 iron ii oxide feo 1 57 iron iii oxide 0 88 magnesium oxide mgo 0 84 water h2o 0 39 titanium dioxide tio2 0 19 diphosphorus pentoxide p2o5 and 0 12 manganese oxide mno.
This composition is as follows.
The granite is composed of feldspar and quartz with minor maffics crystals 4 cm in diameter.
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.
The exact chemical composition of marble will greatly vary dependong on the location and the minerals or impurities present in the limestone during recrystallization.
Chemical composition of the core corresponds to oligoclase and andesine an30 38 whereas more acidic oligoclase and andesine occur in the margin.
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 is commonly used for sculpture and as a building material.