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.
Placer Diamonds in the Northwest Territories. Diamond Mining in the U.S.A. Space Diamonds / Carbonado. For whatever reason, very few miners are looking for diamonds in the U.S. That is a real shame, because the U.S.A. sits on an extremely old massive Craton. Cratons are the earth's diamond making factories, 150-250 miles down.