Agate gem. The original agate stone mainly comes from the south red agate around Maqu County, Gannan Tibetan Autonomous Prefecture, Gansu Province. The south red agate here is called the old Gannan jewelry because of its bright color, moist and rich impression. Old Gannan jewelry is one of the red agates in southern Gansu, with pure and bright color, thick texture and high density, mostly between orange red and big red.