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Gold in Jasperoid

Jasperoid is a jasper-like siliceous rock, in which chalcedony or cryptocrystalline quartz has replaced limestone, dolomite, or shale. It forms the gangue of many important ore bodies. It is stained by iron and manganese oxides into shades of...

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The Bawl Mill   • Clinton Declares Three More National Monuments   • McCain Derides Clinton Forest Policy   • Foreigners Lure Mining Partners   • Pacific Island Gov'ts Focus on Undersea Mining   • Options Narrowed for Managing Chugach National Forest   • Company Notes   • Diamond Fever   • Underground Geologic Mapping   • New Quarry Regulations in West Virginia   • Ash Fork Calm After Explosives Theft   • Picks & Pans: Mining in Ghana   • Little Rocky Mountains, Montana   • Collector Reaches New Lows to Find Bottles   • Chinese Camp, California and the Tong War of 1856   • Millie's Tailings   • Visionaries, Scoundrels, and Gamblers   • Executive Defends Special Mill Site Exemption   • Chasing the Ghosts of Forty-Niners   • Washoe County Balks at Black Rock Desert Plan   • State's Only Gold Mine Processes Last Precious Ore   • Melman on Gold & Silver   • Mining Stock Quotes and Mineral & Metal Prices   • Looking Back

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