Earnings drop at South Africa's Omnia on weak mining sector

South African diversified chemical services provider Omnia reported a fall in full-year earnings on Tuesday, dragged down by the ailing mining sector which has been hobbled by falling prices. Omnia said headline earnings per share, the main profit measure in South Africa, slumped 29 percent to 10.33 rand in the year to March compared with 14.56 in the previous year. "Overall, market conditions remain challenging and some of the key factors affecting market conditions are as follows: softer deman