Metals magnate is poorer by $1.5 billion, as shares of his London-listed Vedanta Resources plunged on falling commodity prices. Company's Indian arm, Vedanta, has resumed mining iron ore in Goa state after the Supreme Court lifted a ban last year, but it still faces a cap on how much it can mine. Minority investors are opposing oil-and-gas unit Cairn India's merger with Vedanta on grounds that the terms are unfavorable and Vedanta may use Cairn's cash hoard to pay down its debt.