For the higher level ore in Pandaria, it comes in two types of Trillium ore – Black Trillium Ore and White Trillium Ore. To smelt Trillium Bars, you need 2 of each type of ore per bar.
This is a rare spawn ore, so it will spawn in ghost iron nodes. If you are farming, you can increase the trillium nodes by mining ghost iron nodes.
It can be farmed in Townlong Steppes, Dread Wastes and Vale of Eternal Blossoms. When farming, following the Zandalari paths tend to be farmed by those trying to get mounts and mat bags.
It is also in Jade Forest and Valley of the Four Winds, but only for the daily 90 zones.
You can also mine the following gems: