vitric

/ˈvɪtrɪk/
adjective
  1. Relating to, resembling, or made of glass; glassy in appearance or texture.
    • The geologist identified the sample as vitric tuff because of its glassy fragments.
    • The vitric surface of the volcanic rock sparkled like obsidian in the sunlight.
    • Ancient vitric beads were prized for their smooth, shiny finish.
Antonyms
What does "vitric" mean? | whatsthatwordmean | whatsthatwordmean