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molybdenum and lead mineral

Rock Science: Wulfenite, Molybdenite & Molybdenum

By Steve Voynick Of the 42 minerals that contain molybdenum as an essential element, most collectors are familiar only with wulfenite and molybdenite. Wulfenite (lead...
Pyrolusite dioxide

Rock Science: Pyrolusite and Manganese

By Steve Voynick Manganese is an element that we rarely, if ever, see in its metallic state, but that nevertheless plays a big part of...

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