"Surely there is a mine for silver and a place where gold is refined.
Cross References
Job 27:23It claps its hands at him and hisses him out of his place.
Job 28:2Iron is taken from the earth, and copper is smelted from ore.
 Treasury of Scripture
Surely there is a vein for the silver, and a place for gold where they fine it.
vein.
Genesis 2:11,12
 The name of the first is Pison: that is it which compasseth the whole land of Havilah, where there is gold; … 
Genesis 23:15
 My lord, hearken unto me: the land is worth four hundred shekels of silver; what is that betwixt me and thee? bury therefore thy dead.
Genesis 24:22
 And it came to pass, as the camels had done drinking, that the man took a golden earring of half a shekel weight, and two bracelets for her hands of ten shekels weight of gold;
where they fine it
Psalm 12:6
 The words of the LORD are pure words: as silver tried in a furnace of earth, purified seven times.
Proverbs 17:3
 The fining pot is for silver, and the furnace for gold: but the LORD trieth the hearts.
Proverbs 27:21
 As the fining pot for silver, and the furnace for gold; so is a man to his praise.