Minerals from Iowa

Aragonite from Rice's Cave, Dubuque, Dubuque County, Iowa

Barite from Linwood Mine, Buffalo, Scott County, Iowa

Barite from Linwood Mine, Buffalo, Scott County, Iowa

Barite from Linwood Mine, Buffalo, Scott County, Iowa

Calcite from Oskaloosa area coal mines, Mahaska County, Iowa

Calcite from Oskaloosa area coal mines, Mahaska County, Iowa

Calcite from Mich Mine, Mahaska County, Iowa

Calcite from Linwood Mine, Buffalo, Scott County, Iowa

Calcite from (Linwood Mine), Buffalo, Scott County, Iowa

Calcite from Oskaloosa area coal mines, Mahaska County, Iowa

Calcite in Quartz Geode from Keokuk, Lee County, Iowa

Calcite in Quartz Geode from Keokuk, Lee County, Iowa

Calcite on Calcite from Pershing Mine, Attica, Marion County, Iowa

Calcite on Calcite from Oskaloosa area coal mines, Mahaska County, Iowa

Calcite on Calcite from Pershing Mine, Attica, Marion County, Iowa

Calcite on Calcite from Oskaloosa area coal mines, Mahaska County, Iowa

Calcite on Calcite from Oskaloosa area coal mines, Mahaska County, Iowa

Calcite over Calcite from Marion City, Linn County, Iowa

Calcite twinned crystals with Marcasite inclusions from Linwood Mine, Buffalo, Scott County, Iowa

Calcite with iridescent Limonite coating from Lost Creek Coal Mine, Beacon, Iowa

Calcite with Marcasite inclusions from Linwood Mine, Buffalo, Scott County, Iowa

Calcite with Marcasite inclusions from Linwood Mine, Scott County, Iowa

Calcite with Pyrite and Marcasite inclusions from Pint's Quarry, Raymond, Black Hawk County, Iowa

Calcite with Pyrite inclusions from New Sharon, Mahaska County, Iowa

Calcite, Fluorite, Millerite, Pyrite from Iowa

Calcite, Marcasite, Pyrite from attributed to La Farge Quarry(?), Buffalo, Scott County, Iowa

Celestine from U.S. Gypsum Mine, Sperry, Des Moines County, Iowa

Celestine from U.S. Gypsum Mine, Sperry, Des Moines County, Iowa

Fluorite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Fluorite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Fluorite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Fluorite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Fluorite on Calcite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Fluorite on Calcite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Fluorite on Calcite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Fluorite on Calcite with Pyrite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Fluorite on fossilized Coral from Pint's Quarry, Raymond, Black Hawk County, Iowa

Fluorite with Calcite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Fluorite with Pyrite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Fluorite with Pyrite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Goethite on Calcite from Monroe Cty., Iowa

Gypsum from Route 12, north of Sioux City, Plymouth County, Iowa

Iron Meteorite from Crystal Lake, Iowa

Marcasite intersecting stalactitic formations from Linwood Mine, Buffalo, Scott County, Iowa

Marcasite with Barite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Millerite from Ollie Quarry, Keokuk County, Iowa

Millerite and Quartz from Ollie Quarry, south of Iowa City, Keokuk County, Iowa

Millerite in Calcite from Keokuk, Lee County, Iowa

Pyrite (iridescent) from Pint's Quarry, Raymond, Black Hawk County, Iowa

Pyrite (stalactitic formations) with Calcite from Linwood Mine, Buffalo, Scott County, Iowa

Pyrite on Calcite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Pyrite on Calcite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Pyrite on Calcite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Quartz Geode with Calcite from Keokuk, Lee County, Iowa

Quartz Geode with Calcite from Iowa

Quartz Geode with Calcite from Keokuk, Lee County, Iowa

Quartz Geode with Calcite from Keokuk, Lee County, Iowa

Quartz Geode with Calcite and Sphalerite from Keokuk, Lee County, Iowa

Quartz Geode with Pyrite from Keokuk, Lee County, Iowa

Quartz var. Chalcedony with Pyrite and Calcite from Pint's Quarry, Raymond, Black Hawk County, Iowa

Quartz var. Keswick Agate from Keswick, Keokuk County, Iowa

Sphalerite in Calcite Geode from Geode area, Keokuk, Iowa