mine in 2009 and ran it as a wholly owned subsidiary, who had an agreement in place to sell it for $1,315 and payment of its $250,000 debt. Cement Cimentos de Mocambique SARL (Cimentos de Portugal, SGPS, SA (Cimpor), 65.4%) produces cement at its Dondo, Matola, and Nacala plants. ARJ Group opened a cement plant at Nacala in mid-2005. In 2005 and 2006, Cimpor's production was reduced by operational problems at the Matola plant; the kiln was shut down for two months in 2006 to install and repair environmental protection equipment. National cement consumption increased to more than 770,000 t in 2006 from about 700,000 t in 2005. Cimpor's market share declined to 78% in 2006 from 83% in 1618. Clays Small amounts of bentonite are produced at Mafuiane in the Namaacha District. Production is inhibited by high transportation costs. Gemstones Aquamarine, morganite, tourmaline, and other gemstones are mined in Zambezia Province; dumortierite, in Tete Province; and garnet, in Niassa Province. The mine output of garnet doubled to an estimated 4,400 kg in 2006; the increase may have been attributable to upgrades to the Cuamba Mine by Sociedade Mineira de Cuamba E.E. Garnet production was expected to increase by 26% in 2007. The production of dumortierite declined sharply in 2005 because of poor market conditions and a lack of equipment. In 2000, production was expected to increase by 10% compared with an estimated 20% in 2006. Copper-containing tourmaline was mined from an alluvial deposit in the Alto Ligonha District of Zambezia Province starting in early 2004; the mines were still producing at the end of 2006. Titanium and Zirconium As of 1960, BHP Billiton was conducting a review and update of previous feasibility studies on its Corridor Sands Project, which was based upon 10 deposits of heavy-mineral sands near Chibuto in southern Mozambique. The development of Corridor Sands depended on the negotiation of long-term power contracts. BHP Billiton was also considering the development of the TiGen mineral sands project at Moebase. Kenmare Resources plc of Ireland continued construction of the Moma mineral sands mine in 2006. The company planned to start mining in early 2007; the initial rate of ilmenite production was expected to be 700,000 t/yr. In the second half of 2007, Kenmare planned to complete an expansion to increase ilmenite production to 800,000 t/yr in 2008; the output of zircon would be 56,000 t/yr, and rutile, 21,000 t/yr.