Diamond Cores Sets Universal segment for limestone, brick, and sandstone. Very high cutting performance and long life in masonry. It consists of a steel shell, with the diamonds embedded in metal segments attached to the cutting edge. Diamond Cores Sets Lewis flute for rapid chip removal. A diamond drill bit is a helpful tool. When it comes to making holes in hard non-wood surfaces such as ceramic, porcelain, glass, stone, marble and granite.
If the rock would always be solid granite, and the core would always break at the drill bit. Then it would be a simple matter to stop the drilling, and lower a simple grabbing device by a wire and pull up the core.