"massive" as an adjective to visually describe an occurrence/intersection of a mineral/mineral assemblage in which the entity represents 99+% by vol, or a body of rock which appears to possess a homogeneous texture. It has no "$value" associated with it. It's continuity, if observed,"

If we really look at what Don is saying, his assertion, I believe, is that if you are looking at nickel bearing sulphides, or for that matter chromitites, one would prefer to have the term "massive" used in conjunction with it, not that the term "massive" in and of itself is an economical term.