Prismatic Scale
Prismatic Scale is the new scale for Mist of Pandaria and can be obtained by skinning most reptiles, basilisks and turtles. The best place to farm Prismatic Scale would have to be the little island in Krasarang Wilds right above Nayeli Lagoon and below The Temple of the Red Crane. The basilisk to skin to farm Prismatic Scale would be Mortbreath Skulker and Mortbreath Snapper.
See below for the map and area to farm Prismatic Scale in WoW.