I'm helping a partially blind friend. He has some small pieces of polished
Brazilian quartz he wants to drill a hole into. I have found several
suppliers on line that will sell 1/16" and 1/8" diamond bits for reasonable
prices, around $15 per. Slightly less when bought in threes.

Is this what he needs to drill these holes? I know he needs to use coolant,
and set it up in a drill press. Info on what would be the best way to do
this appreciated.

Steve