EXCAVATED is of very hard variety and it has no cracks or fissures. Moreover, if stone is to be excavated on very large scale, blasting method will have to be adopted.After blasting, the excavated stone is sorted out in different sizes and categories. Explosives such as blasting powder, blasting cotton, dynamite and cordite are used. The operations involved are boring, charging, tamping and fining.Digging or Excavating: Stones buried in earth or under loose overburden are excavated with pick axes, crow bars, chisels, hammers, etc.Heating:Heating is most suitable for quarring small, thin and regular blocks of stones from rocks, such as granite and gneiss. A heap of fuel is piled and Fred on the surface of rock in small area. The two consecutive LAYERS of the rocks separate because of UNEVEN expansion of the two layers.The loosened rock PORTIONS arc broken into pieces of desired size and are removed with the help of pick-axes and crowbars. Stone blocks so obtained are very suitable for coarse rubble masonry.Wedging:This method is mainly used for the rock of sedimentary type, which are comparatively SOFT, such as sandstone, limestone, marble, slate, laterite.In this method, first of all naturally occurring cracks or fissures are located in the rocks, to be excavated. The steel wedges or points are then driven with the help of hammer, in hammer fissures or cracks and stones are detached. The split out blocks of stone can be converted into marketable forms and supplied to users.