Oman Gypsum quarry is located 19 km South of Thumrait city, Salalah. Thumrait is the nearest city. Quarry is located 4 Km (well graded road) away from the Muscat- Salalah dual carriage main highway. ... VIEW ALL PRODUCTS. Contact. OMAN INDUSTRIES GYPSUM L.L.C P.O BOX 101, SALALAH -218 SULATANATE OF OMAN Help Line. 00968 …