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  3. Materials Facet
  4. Materials (hierarchy name)
  5. materials (substances)
  6. [materials by composition]
  7. inorganic material
  8. metal
  9. [metal by composition or origin]
  10. nonferrous metal
  11. [gold and gold alloy]
  12. gold alloy
  13. [gold alloy by composition or origin]
  14. electrum
Scope note
The natural alloy of silver and gold. Under the Egyptian name of Asem, it was believed to be an elementary metal until the Romans made it as an alloy.
Accepted term: 15-Jul-2024