Adam Clarke on Job 28:1

Surely there is a vein for the silver - This chapter is the oldest and finest piece of natural history in the world, and gives us very important information on several curious subjects; and could we ascertain the precise meaning of all the original words, we might, most probably, find out allusions to several useful arts which we are apt to think are of modern, or comparatively modern, invention. The word מוצא motsa, which we here translate vein, signifies literally, a going out; i.e., a mine, or place dug in the earth, whence the silver ore is extracted. And this ore lies generally in veins or loads, running in certain directions.

A place for gold where they fine it - This should rather be translated, A place for gold which they refine. Gold ore has also its peculiar mine, and requires to be refined from earthy impurities.