[f. VEIN sb.] = VEIN-STONE 1.
1833–4. J. Phillips, Geol., in Encycl. Metrop. (1845), VI. 769/1. Metallic matter and certain nonmetallic substances usually connected therewith, and commonly called vein-stuff.
1872. Smyth, Mining Statistics, 49. The vein-stuff got from the deepest levels is not so rich per ton as the stone obtained in the upper half of the mine.
1881. Nature, XXV. 50. Malleable native copper … intimately mixed with siliceous vein-stuff.
