It is well-known that there are, broadly speaking, two types of diamonds sold in the world – those born of Mother Nature, and the other manmade synthetic diamonds.

Opinion - Recently, stakeholders in the mining business in Tanzania have been up in arms over what they call the trade in fake tanzanite. Three issues need to be raised here.

Dec. 14 -- The blue precious gem tanzanite is a hot item in shopping malls across America this holiday season, and if federal investigators are right, Osama bin Laden couldn't be happier. "It's ...