How they made it many centuries back ?
1. Circular cut
|Is it made by lathe machine ?||Is it made by lathe machine ?|
|India, Karnataka, Hampi
||India, Hoysaleswara temple|
2. Separating block stone
But why the people are using around the word rectangular holes ?
How they made the rectangular holes ?.
|India, Brihadeeswarar Temple||Peru, Machu Pichu|
3. Tube drill holes
In granite and dolerie (hardness 6 & 7 on scale of 10) !:
|Giza, granite with spiral grooves|
In diamerter of approx 8 inches and one turn causing 2 mm depth in granite !
How is it made ?
4. Poundering ?
|Egypt, Aswan||Egypt, Aswan
As per some scholars the shaping of the obelisk was done with diorite pounder stones.
Diorite has a hardness 6-7, out of 10 on the Mohs scale (diamond is 10).
So diorite have almost same hardness as the granite, therefore this technique would be very inefficient.
4. Saw (straight & circular)
|Egypt, Giza||Egypt, Giza|
||Egypt, Abu Rawash
Circular saw mark in Abu Rawash: