Pyrolusite dioxide

Rock Science: Pyrolusite and Manganese

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Puddingstone

For the Love of Mineral Names

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Edge conforming

Bench Tips: A Fanciful Project

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Ozokerite

Rock & Gem Kids: Examining Ozokerite

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Ewingite oxycarbonate

Update: The Carbon Mineral Challenge

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Kartchner Caverns stalactites

Arizona Underground: Mine Tours, Museums, and Caves

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5 Five Fascinating Facts: Chalcopyrite

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Danburite crystals

Danburite: A Chemistry Confirmed at Yale University

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Quartz covered in chlorite balls

The Hemlock Claims: Sources Rich in History and Unique Specimens

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Small-scale gold mining

Old Mining Law in a New Era

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