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- 14:31, 21 June 2026 Cornish semiconductor talk contribs created page Pyrite (Created page with "* Lustre:Metallic * Transparency:Opaque * Colour:Pale brass-yellow * Streak:Greenish-black * Hardness:6 - 6½ on Mohs scale * Tenacity:Brittle * Cleavage:Poor/Indistinct Indistinct on {001}. * Fracture:Irregular/Uneven, Conchoidal https://www.mindat.org/min-3314.html pyrite page on mindat One of the most common semiconducting minerals, pyrite exhibits high conductivity and easily provides a voltage drop - often in both polarities equally, rectification is harder to...")