That may be so, but the advent of diamond-tipped drills is not new, so I don't know your point.

I recall a story from the mid-1990s when Canada had a claim staking rush for diamonds.  One company had a stunning press release about finding a micro "fancy yellow" diamond in their drill core, suggesting larger yellow diamonds were in the pipe they were drilling.  To that point, it was the biggest story to come out of the Canadian diamond rush. 

Some days later, that company had to put out another PR apologizing when they found the micro "fancy yellow" diamond came off the drill bit.  You see, imperfect diamonds and cutter's waste get crushed to become part of compounds for industrial grinding, including on the tips of drills of all kinds.  These can be "shed" while being used.

As an aside, and for anyone who may not know, "fancy yellow" diamonds are the most valuable; they can be worth several times the highest grades of colorless diamonds on a carat-for-carat basis. 

By the way, until recently, all brown diamonds were trash, having no retail value, though in volume, there has long been a small market for industrial purposes.