Definition of veinstone in English:

veinstone

noun

  • another term for gangue
    • ‘The veinstone is pure quartz containing water in microscopical cavities, as in the quartz crystals of granite, but not combined as in the hydrous siliceous sinter deposited from hot springs.’
    • ‘Some of this is disseminated within the veinstone, but there is evidence from a number of lodes that, after the initial tourmaline deposition, a residual quartz/cassiterite phase was produced.’

Pronunciation:

veinstone

/ˈveɪnstəʊn/