#51620, Barite and Calcite over Fluorite, Minerva #1 Mine, Illinois (m) $48

#57072, Sphalerite on Galena, Tri-State Lead-Zinc Mining District, Kansas (m) $28

#43453, Barite, Cave-in-Rock District, Illinois (m) $30

#49342, Sphalerite, Elmwood Mine, Tennessee (c) $75

#54709, Copper (crystallized), Cliff Mine, Michigan (m) $125

#39280, Calcite on Calcite, Meshberger Quarry, Indiana (m) $45

#56792, Calcite with Pyrite-Marcasite, Brushy Creek Mine, Missouri (c) $55

#34136, Barite, Cave-in-Rock District, Illinois (m) $28

#44996, Fluorite, Pugh Quarry, Ohio (t) $25

#57650, Pyrite (bar-shaped crystals), Buick Mine, Missouri (m) $225

#53993, Chalcocite with Bornite coating, Flambeau Mine, Wisconsin (m) $225

#55796, Fluorite with Chalcopyrite inclusions, Cave-in-Rock District, Illinois (m) $150

#50011, Sphalerite with Dolomite, Elmwood Mine, Tennessee (m) $30

#57724, Fluorite with Chalcopyrite, Rosiclare District, Illinois (c) $125

#56615, Rutile (eightling-twin), Perovskite Hill, Magnet Cove, Arkansas (t) $135

#57517, Galena on Dolomite with Marcasite, Brushy Creek Mine, Missouri (m) $25

#44088, Calcite, Cave-in-Rock District, Illinois (m) $28

#45882, Millerite on Calcite, Bayport Quarry, Michigan (t) $15

#53320, Barite, Cave-in-Rock District, Illinois (m) $28

#57733, Silver (crystallized), Caledonia Mine, Michigan (t) $200

#49643, Calcite, Tri-State Lead-Zinc Mining District, Missouri (c) $42

#56460, Calcite, South Dakota (c) $65

#53628, Fluorite and Calcite, Cave-in-Rock District, Illinois (m) $18

#56430, Fluorite and Sphalerite, Cave-in-Rock District, Illinois (c) $75

#55888, Fluorite with Pyrite inclusions, Minerva #1 Mine, Rosiclare Level, Illinois (c) $95

#52105, Fluorapatite, Meramec Mine, Pea Ridge, Missouri (t) $32

#45282, Barite, Lamb Mine, Missouri (m) $40

#57509, Galena with Sphalerite and Marcasite, Sweetwater Mine, Missouri (c) $38

#55435, Calcite, Minerva #1 Mine, Illinois (m) $75

#44415, Galena on Sphalerite with Dolomite, Wilbur Mine, Tri-State Lead Mining District, Kansas (m) $85

#26379, Millerite and Marcasite in Quartz Geode, US Route 27 road cut, Halls Gap, Kentucky (t) $18

#54799, Fluorite on Barite, Caldwell Stone Quarry, Kentucky (m) $28

#56402, Barite with Calcite, Elk Creek, South Dakota (t) $8

#51438, Witherite, Cave-in-Rock District, Illinois (m) $325

#46696, Fossilized Discoscaphites Conradi, Fox Hills Formation, South Dakota (c) $30

#57252, Sphalerite and Barite over Dolomite, Elmwood Mine, Tennessee (c) $65

#57121, Fluorite, Elmwood Mine, Tennessee (c) $65

#56467, Rutile in Calcite, Diamond Jo Quarry, Magnet Cove, Arkansas (m) $35

#54707, Copper (arborescent crystals), Central Mine, Michigan (m) $150

#54790, Barite on Calcite, Elk Creek, South Dakota (c) $48

#53991, Barite, Elk Creek, South Dakota (m) $95

#57730, Silver, Caledonia Mine, Michigan (m) $150

#56086, Galena (with cavernous corner faces), Sweetwater Mine, Missouri (c) $38

#55502, Pyrite on Dolomite, Killough Quarry, Kansas (t) $16

#53155, Fossilized Discoscaphites Conradi, Fox Hills Formation, South Dakota (m) $30

#56319, Calcite on Dolomite with Chalcopyrite and Galena, Sweetwater Mine, Missouri (m) $28

#51254, Calcite, St. Joe Mine, No. 14 Shaft, Missouri (c) $55

#57732, Silver (crystallized), Caledonia Mine, Michigan (m) $225

#57057, Quartz var. Solution Quartz, Jeffrey Mine, Arkansas (m) $25

#56095, Sphalerite, Tri-State Lead-Zinc Mining District, Missouri (m) $45

#57954, Sphalerite on Calcite-Dolomite, Pugh Quarry, Ohio (t) $25

#39042, Barite with Calcite and Chalcopyrite, Minerva #1 Mine, Illinois (c) $38

#56384, Calcite, Pugh Quarry, Ohio (c) $28

#44341, Goethite, Sellwood Mine, Michigan (m) $32

#44982, Fluorite, Pugh Quarry, Ohio (t) $15

#45064, Sphalerite (iridescent) with Pyrite, Tri-State Lead-Zinc Mining District, Oklahoma (m) $25

#57200, Fluorite on Sphalerite, Elmwood Mine, Tennessee (c) $25

#55291, Fossilized Sphenodiscus, Fox Hills Formation, South Dakota (m) $48

#56932, Calcite on Calcite, Pershing Mine, Iowa (m) $26

#55750, Fluorite, Elmwood Mine, Tennessee (m) $40

#56290, Calcite on Dolomite with Chalcopyrite, Sweetwater Mine, Missouri (c) $35

#55455, Fluorite, Minerva #1 Mine, Illinois (c) $85

#38862, Wavellite with Variscite, Maudlin Mountain, Arkansas (c) $22

#54762, Diamond (0.28 carat pale-brown octahedral crystal), Crater of Diamonds State Park, Arkansas (t) $265

#56008, Calcite with Dickite inclusions on Dolomite with Chalcopyrite, Sweetwater Mine, Missouri (c) $30

#56695, Hematite, Ishpeming, Michigan (c) $30

#55727, Calcite with Pyrite inclusions, Tri-State Lead-Zinc Mining District, Missouri (m) $65

#56694, Galena with Quartz, Sweetwater Mine, Missouri (m) $28

#55708, Sphalerite, Elmwood Mine, Tennessee (c) $45

#56791, Galena and Calcite on Dolomite with Chalcopyrite, Sweetwater Mine, Missouri (c) $36

#57804, Rutile (eightling-twin), Perovskite Hill, Magnet Cove, Arkansas (t) $125

#57702, Calcite, Pugh Quarry, Ohio (m) $35

#28889, Sphalerite with Chalcopyrite, Tri-State Lead-Zinc Mining District, Missouri (c) $28

#57181, Fluorite with Chalcopyrite, Denton Mine, Illinois (c) $85

#57852, Calcite with Chalcopyrite and Malachite, Sweetwater Mine, Missouri (c) $35

#57970, Calcite, Pugh Quarry, Ohio (c) $35

#58164, Copper and Calcite, Keweenaw Peninsula Copper District, Michigan (m) $35

#57950, Pyrite, Ohio (t) $24

#57992, Quartz, Ouachita Mountains, Arkansas (c) $25

#57969, Calcite, Pugh Quarry, Ohio (m) $40

#58094, Sphalerite (Spinel-law twinned crystals), Mid-Continent Mine, Kansas (m) $65

#58101, Gypsum var. Selenite, Great Salt Plains, Oklahoma (t) $22

#57968, Calcite, Pugh Quarry, Ohio (c) $45

#58071, Gypsum, Route 12, north of Sioux City, Iowa (m) $18

#58078, Barite with Calcite, Elmwood Mine, Tennessee (c) $42

#39023, Calcite with Pyrite, Minerva #1 Mine, Illinois (m) $26

#58104, Barite, Elk Creek, South Dakota (t) $65

#39589, Galena with Sphalerite, Cave-in-Rock District, Illinois (t) $22

#58144, Galena, Van Pool Mine, Oklahoma (c) $40

#48268, Celestine with Pyrite inclusions in Quartz geode, Lehigh Portland Cement Co. Quarry, Indiana (m) $28

#57355, Calcite on Barite, Elmwood Mine, Tennessee (lc) $400

#56059, Fluorite, Minerva #1 Mine, Illinois (lc) $400

#48813, Fluorite with Calcite, Cave-in-Rock District, Illinois (lc) $225

#40155, Sphalerite with Calcite, Elmwood Mine, Tennessee (lc) $55

#52927, Barite on Calcite, Elk Creek, South Dakota (lc) $250

#56364, Sphalerite with Dolomite, Tri-State Lead-Zinc Mining District, Missouri (lc) $125

#58134, Fluorite, Hill-Ledford Mine, Illinois (lc) $250

#58178, Barite on Fluorite, Crystal Mine, Illinois (lc) $450

#12199, Copper in Calcite, Quincy Mine, Hancock, Michigan (m) $1250

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