[whswhs]

Well, the Norse legends sometimes call the underground dwellers svartalfar, "dark elves." You might take a look at what they're like.

Another thing that a lot of people associate with dwarves is being all male, or mostly male, or male-dominated, or the women having beards, or some combination. You could alter this. In my current fantasy campaign, one of the assumptions is that dwarf women are dominant, and part of their dominance is control of the hearth—which includes not merely cooking but metallurgy.