haematite

noun
  1. A mineral form of iron oxide (Fe₂O₃) that is the primary ore of iron, typically dark gray or black and metallic in appearance.
  2. Usage: Also spelled hematite (U.S. spelling).; Commonly used in geology and mining.
  3. A polished or raw stone made from haematite, used in jewelry, decorative objects, or as a semi-precious stone.
  4. Usage: Popular in alternative medicine and crystal healing, though without scientific evidence.

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