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- 13:33, 2 August 2026 Cornish semiconductor talk contribs created page Marcasite (Created page with "thumb|right|frame|Marcasite from Wheal Unity, Gwennap * Lustre:Metallic, Sub-Metallic * Transparency:Opaque * Colour:Pale brass-yellow, tin-white on fresh exposures. * Streak:Dark-gray to black. * Hardness:6 - 6½ on Mohs scale * Tenacity:Brittle * Cleavage:Distinct/Good Distinct on {101}. {110} in traces. * Fracture:Conchoidal, Sub-Conchoidal [https://www.mindat.org Data from mindat.org] ===Pages mentioning pyrite=== {{Special:WhatLinksHere/Ma...")
