Assertion: mahogany obsidian | /r/HasProperty | volcanic rock
Facets:
Source sentences:
text: The mahogany obsidian is actually a volcanic rock, which is silica-rich and has heaving parts of the magnetite or oxidized hematite that are commonly brick red or colored mahogany brown within a black-colored base material.
text: Mahogany-Obsidian is a volcanic rock that’s silica-rich and contains undulating parts of oxidized Hematite or Magnetite, which are usually colored mahogany brown or brick red within a black-colored base material.