The true marble is crystalline limestone that is characterized with diverse proportions of dolomite.
Chemical composition of marble and granite.
Marble is commonly used for sculpture and as a building material.
These minerals make up more than 80 of the rock.
The egyptian granite is found in various colors in egypt including pink white grey and dark red.
Other common minerals include mica muscovite and biotite and hornblende see amphibole.
Accessory minerals of granite.
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.
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.
Zircon and apatite mainly as inclusions in biotite titanite orthite magnetite pyrite.
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.
The granite is composed of feldspar and quartz with minor maffics crystals 4 cm in diameter.
Typically marble is composed of the following major constituents.
It consists of coarse grains of quartz 10 50 potassium feldspar and sodium feldspar.
Chemical composition of the core corresponds to oligoclase and andesine an30 38 whereas more acidic oligoclase and andesine occur in the margin.