3. Art of extracting stone from rock bed is known as Quarrying
QUARRYING OF STONES
Art of extracting stone from rock bed is known as Quarrying

4. Methods of Quarrying Quarrying With Hand Tools Digging and excavating
Heating
Wedging

5. Methods of Quarrying
2. Quarrying By Channeling Machine:

6. Methods of Quarrying
3. Quarrying By Blasting: Manufacturing of stone aggregates Materials Gun Powder or Dynamite detonator

7. Characteristics of Good Stones
Appearance and colour
Weight
Porosity and absorption
Compactness - Durability
Fire resistance
Electrical resistance

8. Hardness & Toughness
Strength
Durability
Dressing
Cost
Seasoning – Quarry sap

9. Criteria for selection of stones
High wind exposed building –
Heavy engineering works –
Fire exposed Building -
Flooring & Switch boards –
Hardness – Granite
Strong, Durable - Granite
Fire resisting property -
Sandstone
Electrical resistance -
Marble

10. Attractive colours – Granite & Marble
Roads & Coarse Aggregate-
Manufacturing of cement –
Facing Works –
Ornamental works –
Abrasion Resistance -
Basalt
Lime – Limestone
Attractive colours – Granite & Marble
Soft - Sandstone