Minerals from Midwest, USA

Copper, Quartz, Epidote from Keweenaw Peninsula Copper District, Michigan

Copper, Silver and Calcite from Quincy Mine, Hancock, Keweenaw Peninsula Copper District, Houghton County, Michigan

Copper, Silver, Datolite from Central Mine, Keweenaw Peninsula Copper District, Michigan

Corallite Fossils (Devonian) from Petoskey, Emmet County, Michigan

Datolite from Lake Superior Copper Distric, Keweenaw Peninsula, Michigan

Datolite from Keweenaw Peninsula Copper District, Michigan

Datolite from Keweenaw Peninsula Copper District, Michigan

Datolite from Keweenaw Peninsula Copper District, Michigan

Datolite from Mass Mine, Ontonagon County, Michigan

Datolite nodule from Centennial Mine, Calumet, Houghton County, Michigan

Datolite nodule from Keweenaw Peninsula Copper District, Michigan

Datolite nodule from Keweenaw Peninsula Copper District, Michigan

Datolite nodule with Hematite and Copper inclusions from Keweenaw Peninsula Copper District, Michigan

Datolite nodule with Hematite and Copper inclusions (cabochon) from Keweenaw Peninsula Copper District, Michigan

Datolite nodule with Hematite and Copper inclusions (cabochon) from Keweenaw Peninsula Copper District, Michigan

Datolite nodule with Hematite and Copper inclusions (cabochon) from Keweenaw Peninsula Copper District, Michigan

Datolite nodules with Hematite and Copper inclusions from Keweenaw Peninsula Copper District, Michigan

Datolite nodules with Hematite and Copper inclusions (plus 3 cabochons) from Keweenaw Peninsula Copper District, Michigan

Datolite on Copper from Keweenaw Peninsula Copper District, Michigan

Datolite with Hematite and Copper inclusions from Mass Mine, Keweenaw Peninsula Copper District, Ontonagon County, Michigan

Datolite with Hematite and Copper inclusions from Quincy Mine, Hancock, Keweenaw Peninsula Copper District, Houghton County, Michigan

Datolite with Native Copper from Calumet, Michigan

Delindeite from Diamond Jo quarry, Magnet Cove, Hot Spring County, Arkansas (Type Locality for Delindeite)

Diamond (0.04 carat pale-yellow flattened crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.05 carat pale-brown flattened crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.06 carat colorless irregular crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.06 carat pale-brown irregular crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.06 carat pale-yellow octahedral crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.08 carat pale-brown dodecahedral crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.08 carat yellow elongated crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.10 carat pale-brown elongated dodecahedral crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.10 carat pale-brown irregular crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.12 carat pale-brown irregular crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.13 carat pale-brown elongated crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.13 carat pale-brown irregular crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.16 carat pale-brown irregular crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.16 carat pale-brown octahedral crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.17 carat pale-brown irregular crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.18 carat colorless macle, twinned crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.21 carat white crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.22 carat colorless macle, twinned crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.23 carat brown irregular crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.23 carat white crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.28 carat pale-brown octahedral crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.32 carat brown irregular crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (0.96 carat brown octahedral crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diamond (1.21 carat flawless yellow elongated tetrahexahedral crystal) from Crater of Diamonds State Park, Murfreesboro, Pike County, Arkansas

Diploscaphites Fossil from Late Cretaceous Formation, Fox Hills, South Dakota

Discoscaphites Conradi Fossil from Fox Hills, South Dakota

Discoscaphites Fossil from Fox Hills, South Dakota

Dolomite from Corydon, Harrison County, Indiana

Dolomite from Corydon Stone Quarry, Harrison County, Indiana

Dolomite from Tri-State Lead-Zinc Mining District, near Joplin, Jasper County, Missouri

Dolomite from Black Rock Quarry, Lawrence County, Arkansas

Dolomite and Calcite on fossilized coral from Clifty Falls State Park, Madison, Jefferson County, Indiana

Dolomite and Chalcopyrite from Black Rock Quarry, Lawrence County, Arkansas

Dolomite on Calcite from Corydon, Indiana

Dolomite on Calcite from Clifty Falls State Park, Madison, Jefferson County, Indiana

Dolomite on Calcite from Corydon Crushed Stone Quarry, Harrison County, Indiana

Dolomite on Quartz from Williamsville Quarry, Poplar Bluff, Butler County, Missouri

Dolomite on Quartz from Black Rock Quarry, Lawrence County, Arkansas

Dolomite on Quartz from Gray's Quarry, Hamilton, Illinois

Dolomite pseudomorph after Calcite from Viburnum Trend, Missouri

Dolomite pseudomorph after Halite from Fairview, Major County, Oklahoma

Dolomite with Calcite from Corydon Stone Quarry, Harrison County, Indiana

Dolomite with Chalcopyrite from Lawrence County, Kansas

Dolomite with Chalcopyrite from Hoxie (Black Rock Quarry), Lawrence County, Arkansas

Dolomite with Chalcopyrite from Black Rock, Lawrence County, Arkansas

Dolomite with Chalcopyrite, Sphalerite from Picher District, Ottawa County, Oklahoma

Dolomite with Fluorite from Corydon Crushed Stone Quarry, Harrison County, Indiana

Dolomite with Quartz from Tri-State Lead-Zinc Mining District, near Joplin, Jasper County, Missouri

Dolomite, Calcite, Chalcopyrite from Black Rock Quarry, Lawrence County, Arkansas

Dolomite, Calcite, Pyrite from Black Rock Quarry, Lawrence County, Arkansas

Dolomite, Chalcopyrite, Pyrite, Marcasite from Hoxie, Lawrence County, Arkansas

Dolomite, Chalcopyrite, Quartz from Black Rock Quarry, Lawrence County, Arkansas

Domeykite from Houghton, Keweenaw Peninsula, Michigan

Domeykite var. Mohawkite from Mohawk Mine, Keweenaw Peninsula Copper District, Michigan

Domeykite var. Stibiodomeykite from Mohawk Mine, Keweenaw Peninsula Copper District, Keweenaw County, Michigan

Dufrenite with Goethite from Indian Mountain, Cherokee County, Alabama

Dufrenite-Kidwellite, Eleonorite, Goethite-Hematite from Indian Mountain, Cherokee County, Alabama

Elbaite var. Watermelon Tourmaline from Shamrock Mine, Black Hills, South Dakota

Elbaite-Schorl Tourmaline from Ingersoll Mine, Keystone District, Pennington County, South Dakota

Epidote from Gratoit Mine, Mohawk, Michigan

Epidote from Centennial Mine, Keweenaw Peninsula Copper District, Houghton County, Michigan

Epidote on Prehnite from Osceola Mine, Keweenaw Peninsula Copper District, Houghton County, Michigan

Eudialyte from Magnet Cove, Hot Spring County, Arkansas

Eudialyte and Aegirine from Magnet Cove, Hot Spring County, Arkansas

Eudialyte var. eucolite from Magnet Cove, Hot Spring County, Arkansas

Fluorapatite from Pea Ridge Mine, Sullivan, Missouri

Fluorapatite from Meramec Mine, Pea Ridge, Washington County, Missouri

Fluorapatite from Meramec Mine, Pea Ridge, Washington County, Missouri

Fluorapatite from Meramec Mine, Pea Ridge, Washington County, Missouri

Fluorapatite from King Lithia Mine, Keystone District, Pennington County, South Dakota

Fluorapatite and Quartz in Galena from Pea Ridge Mine, Washington County, Missouri

Fluorapatite, Magnetite, Quartz, Chalcopyrite from Meramec Mine, Pea Ridge, Washington County, Missouri

Fluorite from Elmwood Mine, Carthage. Smith County, Tennessee

Fluorite from Cave-in-Rock District, Hardin County, Illinois

Fluorite from Denton Mine, Harris Creek District, Hardin County, Illinois

Fluorite from White Rock Quarry, Clay Center, Ottawa County, Ohio

Fluorite from Maumee Stone Quarry, Lime City, Ohio

Fluorite from Maumee Stone Quarry, Lime City, Ohio

Fluorite from Maumee Stone Quarry, Lime City, Ohio

Fluorite from Rosiclare, Hardin County, Illinois

Fluorite from Hardin County, Illinois

Fluorite from Cave-in-Rock, Hardin County, Illinois

Fluorite from Minerva No. 1 Mine, Cave-in-Rock District, Hardin County, Illinois

Fluorite from Hardin County, Illinois

Fluorite from Hardin County, Illinois

Fluorite from Cave-in-Rock District, Hardin County, Illinois

Fluorite from Denton Mine, Hardin County, Illinois

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

Fluorite from Denton Mine, Cave-in-Rock District, Hardin County, Illinois

Fluorite from Cave-in-Rock District, Hardin County, Illinois

Fluorite from Elmwood Mine, Carthage, Smith County, Tennessee

Fluorite from Elmwood Mine, Carthage, Smith County, Tennessee

Fluorite from Elmwood Mine, Carthage, Smith County, Tennessee

Fluorite from Elmwood Mine, Carthage, Smith County, Tennessee

Fluorite from May Stone Company Quarry, Fort Wayne, Allen County, Indiana

Fluorite from May Stone Company Quarry, Fort Wayne, Allen County, Indiana

Fluorite from Annabel Lee Mine, Sub-Rosiclare level at Miller's Ridge, Harris Creek District, Hardin County, Illinois

Fluorite from Minerva #1 Mine, Cave-in-Rock, Hardin County, Illinois

Fluorite from Rosiclare Level, Minerva #1 Mine, Cave-in-Rock District, Hardin County, Illinois

Fluorite from Cave-in-Rock District, Hardin County, Illinois

Fluorite from Denton Mine, Hardin County, Illinois

Fluorite from Auglaize Township, Allen County, Ohio

Fluorite from Cave in Rock District, Hardin County, Illinois

Fluorite from Rosiclare District, Hardin County, Illinois

Fluorite from Clay Center Quarry, Ottawa County, Ohio

Fluorite from Clay Center Quarry, Ottawa County, Ohio

Fluorite from Cave-in-Rock District, Hardin County, Illinois

Fluorite from Sub-Rosiclare level, Denton Mine, Harris Creek District, Hardin County, Illinois

Fluorite from Ozark-Mahoning Mine, Cave-in-Rock District, Hardin County, Illinois

Fluorite from Victory Mine, Cave-in-Rock, Hardin County, Illinois

Fluorite from Victory Mine, Cave-in-Rock, Hardin County, Illinois

Fluorite from Cave-in-Rock District, Hardin County, Illinois

Fluorite from Deardorff-Davis Mine, Cave-in-Rock, Hardin County, Illinois

Fluorite from Denton Mine, Harris Creek District, Hardin County, Illinois

Fluorite from Rosiclare District, Hardin County, Illinois

Fluorite from Deardorff-Davis Mine, Cave-in-Rock, Hardin County, Illinois

Fluorite from Denton Mine, Harris Creek District, Hardin County, Illinois

Fluorite from Gallatin County, Illinois

Fluorite from Rosiclare, Hardin County, Illinois

Fluorite from Cave-in-Rock District, Hardin County, Illinois

Fluorite from Cave-in-Rock District, Hardin County, Illinois

Fluorite from Rosiclare District, Hardin County, Illinois

Fluorite from Rosiclare District, Hardin County, Illinois

Fluorite from Cave-in-Rock District, Hardin County, Illinois

Fluorite from Northwest of Defiance, Defiance County, Ohio

Fluorite from Rosiclare level, Minerva #1 Mine, Cave-In-Rock District, Hardin County, Illinois

Fluorite from Cave-in-Rock District, Hardin County, Illinois