or vein stone
valueless rock or mineral matter occurring in a vein; gangue.
Also called phleb·o·lith [fleb-uh-lith] /ˈflɛb ə lɪθ/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for veinstone
Historical Examples of veinstone
Very often displacement of the walls again takes place, and the infilling or “veinstone” is torn apart and brecciated.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012