To compound the mystery, Ontario's Mines Minister Michael Gravelle told CBC he wasn't even aware of a royalty being collected by his ministry. The royalty is "not his priority," Gravelle said.

"If you work from the premise that I should be the one to know all these details. Precise things. That's not the focus of my priorities in terms of minister. My focus is to be very much the person who goes out there and sells Ontario as an attractive destination for mining sector investment," Gravelle said.

http://www.cbc.ca/news/business/how-cbc-found-the-secret-diamond-royalty-1.3065765