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  4. Materials (hierarchy name)
  5. materials (substances)
  6. [materials by composition]
  7. inorganic material
  8. rock (inorganic material)
  9. metamorphic rock
  10. marble (rock)
  11. [marble by color or pattern]
  12. white marble
  13. porino
Scope note
A bright white and sparkling marble, sometimes with orange stains, that is quarried near Olympia in the Peloponnesus in Greece. Similar to Parian marble but with more compact texture and smaller grain, it is the only white marble that does not effervesce upon contact with nitric acid.
Accepted term: 15-Jul-2024