Master of Alchemy
Chronologically, this is the starting point of Earthmass. It is heavy. It is metal. More than that, Earthmass express a variation of tones and textures. They stand outside of usual genre labels. The closest description I could give is a similarity in some respects to post-rock, albiet much heavier. Earthmass are about crafting their music, sculpting it, and so their music requires the listener's attention and engagement with it. Play loud!