Impact Test:
Impact is conduct to determining the toughness of stone to stand against vibration. It is subjected to impact test in a Page Impact Test Machine as followed:

1. A cylinder of diameter 25mm and height 25mm is taken out from the sample of stones.
2. It is then placed on cast iron anvil of machine.
3. A steel hammer of weight 2kg is allowed to fall axially in a vertical direction over the specimen.
4. Height of first blow is 1cm that of second blow is 2cm that of third blow is 3 cm and so on. Blow at which specimen breaks is noted. If it is nth blow, ‘n’ represents the toughness index of stone.