secondary hematite, magnetite, primary hematite – …
Hematite – Wikipedia, the free encyclopedia. Maghemite is a hematite- and magnetite-related oxide mineral. …Clay-sized hematite crystals can also occur as a secondary mineral formed by weathering processes in … » Free online chat! Magnetite – Wikipedia, the free encyclopedia. Unusual specular hematite pseudomorph after magnetite, from …
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