Natural Version with Paint, Petroglyph G25, Khatm Al Melaha, Kalba, Sharjah. Two Circles, other possible images now invisible. likely Neolithic or earlier. [Fossati 2019 Messages from the Past: Rock Art of the Al-Hajar Mountains (Oman)].Khatm Al Melaha is an archaeological site on the coast of the Oman Sea near Kalba in Sharjah, UAE. It is one of the largest rock art sites in the UAE.