https://twitter.com/TESOnline/status/825739067115585536

the above ^
i think has been misunderstood to be iether part [picture] of a land map [this cant be possible because the object has we see has glistening connected to it] or a belief that it is part of an upclose image of Vvardenfells red mountain lava. [it could be lava, but, "lava moves", what we see in the video is not moving]

however, i believe it has nothing to do with Vvardenfell, infact, i am starting to think that due to the image we see and the sound we hear in the video a glistening of dust like substance, diamond dust in appearance is a new node appearance, and /or perhaps linked to a new type of matterial or resource that can be harvested.

not long ago Eric Wrobel mentioned that we may soon see a different form of resource's other than Magicka and stamina. and that there would be new type to gather and make gameplay and balance a bit more even for all classes.

altho this could all just be wishfull thinking, and perhaps a pure loss on my behalf, i'm willing to take that chance.