Source : Webster's Revised Unabridged Dictionary (1913)

Veinstone \Vein"stone`\, n.
   The nonmetalliferous mineral or rock material which
   accompanies the ores in a vein, as quartz, calcite, barite,
   fluor spar, etc.; -- called also {veinstuff}.

Veinstone \Vein"stone`\, n. (Mining)
   Valueless material surrounding the ore in a lode; gangue;
   matrix.