Somalia's mineral sector was of minuscule value in the overall Somali economy (in 1988 it represented only .3 percent of GDP see table 7, Appendix). There was some production of salt with solar evaporation methods, mining of meerschaum (sepiolite) in the GalgudÍÍÍÍuud Region, mining of limestone for cement in the Berbera and Baardheere areas, and some exploitation of some of the world's largest deposits of gypsum-anhydrite near Berbera, and of quartz and piezoquartz (useful for electronics). Somalia also has some large uranium deposits in the Galguduud and Bay regions, and in 1984 work began to develop them. In the Bay Region, there are also large iron ore deposits. The development plan in 1986 reported that results of natural gas exploration in Afgooye near Mogadishu were negative, but indications of favorable oil and gas resources in the country persisted (see Energy , this ch.). Results of testing for gold in the Ceelbuur area in Galguduud Region and Arabsiyo area near Hargeysa had not been published as of early 1992.