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Originally Posted by
vinay100000
hi i want create holes in hard stones(granite or any other) with the depth of 3 to 4 inches without any sounds as quick as possible.
You're probably looking at using a very strong corrosive like higly concentrated sulphuric acid. You can see the effects of this corrosion on ancient marble statues that have slowly been corroded by acid rain.
It won't be a fast process. I think the most quick but fairly unsafe way will be thermite. The second quickets would be to drill using a tungten or diamond tipped drillbit. And chemical corrosion will be both hazardous and slow.