San Diego-area families say they lost thousands of dollars after investing in an emerald mining operation out of Brazil. Now investors are being warned about that company's legitimacy. As Pietra Verdi ...

Elon Musk's biographer set the record straight on whether Errol Musk ever owned an emerald mine. Walter Isaacson spoke to Musk's father Errol, who told him he exchanged a plane for emeralds. Errol ...