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- 14:32, 28 June 2026 Cornish semiconductor talk contribs created page Cassiterite (Created page with "right|frame|Curve trace for Cassiterite from Wheal Unity Wood * Lustre:Adamantine, Greasy, Sub-Metallic * Transparency:Transparent, Translucent, Opaque * Colour:Black, yellow, brown, red, white, colourless. * Streak:Brownish white, white, greyish * Hardness:6 - 7 on Mohs scale * Tenacity:Brittle * Cleavage:Imperfect/Fair {100} imperfect, {110} indistinct. * Parting:More or less distinct on {111} or {011}. * Fracture:Irregular/U...")