soft-spoken adjective. âº usually âspeaking in a âquiet âvoice: a soft-spoken, âunderstated âstyle. (Definition of soft-spoken from the Cambridge Academic Content Dictionary Â© Cambridge University Press).
The laser drilling process involves the use of an infrared laser (of surgical grade at a wavelength about 1064 nm) to bore very fine holes (less than 0.2 millimeters or 0.005 inches in diameter) into a diamond to create a route of access to a black carbon crystal inclusion.
1 The stone(s) you want to drill a hole in. 2  Dremel, Foredom or similar rotary tool, preferably with a flex-shaft attachment (can be done without the flex-shaft, but will be much easier with). Diamond engraving burrs (or coring bits, but they make holes much larger than I wanted, and also I would have had to special order them). 2  Container deep enough for the stone being drilled, but not so deep you can't comfortably hold the stone in place.