The Sibaiya is famous with rich phosphate ore of high grades (2830% P2O5) and is considered the most important mine economically in the Nile Valley region either east of the Nile or west of the Nile with more than 70% of Nile Valley region reserves more than 500 million tons of phosphate ore. Below is a full chemical analysis of phosphate ore in El Sibaiya Mines. Full Analysis. Red Sea Mines ...