Sep 20, 2018· Apr 3, 2016 The Ad Duwayhi gold mine in Saudi Arabia has begun commercial production, Saudi Arabian Mining Co. (Ma'aden) (TADAWUL:1211) said on. Contact Us. Mahd adh Dhahab. The Mahd adhDhahab is the leading gold mining area in the Arabian Peninsula. It is located in the Province of AlMadinah, in the Hejazi region of Saudi Arabia.