Board Thread:Suggestions forum/@comment-28826152-20161204132512

Emeralds should spawn in harad mountains, khand when it's added and jungle and mangrove. You could sell them to dwarves and buy from travelling haradrim merchants.

Diamonds in ME would have different ID texture to ore and jewel. They would spawn in harad desert and rhun. You could trade them to dwarves and trim bricks with them. And travelling harad merchants sell them. 