BARITE on SIDERITE Frostburg Fire Clay Mine, Allegany Cy. MD Collection of Bob Eberle Photo by Jake Slagle
BARITE AND SIDERITE Frostburg Fire Clay Mine, Allegany Cy., MD Collection of Harold D. Levey Photo by Jake Slagle
MILLERITE Frostburg Fire Clay Mine, Allegany Cy., MD Collection of Harold D. Levey Photo by Jake Slagle
NATIVE SULFUR Martin Mountain near Cumberland, Allegany County, MD Collection of Jake Slagle Photo by Jake Slagle
CELESTINE ON LIMESTONE Martin Mountain near Cumberland, Alleghany Cy., MD Collection of Jake Slagle Photo by Jake Slagle
CHABAZITE (variety Haydenite) Jones Falls,Baltimore, Maryland Collection of Fred J. Parker Photo by Jake Slagle
ALMANDINE (Garnet Family) Harbor Tunnel Digs, Baltimore, Maryland Collection of Bob Eberle Photo by Jake Slagle
MUSCOVITE with INTRUSIONS 29th Street Bridge, Jones Falls, Baltimore City, MD Collection of Harold D. Levey Photo by Jake Slagle
CUMMINGTONITE Bare Hills Copper Mine, Baltimore County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
APATITE (historic) CLOSE UP Jones Falls Quarries Baltimore City, Maryland Collection of Jake Slagle Photograph by Jake Slagle
CHALCOPYRITE Bare Hills Copper Mine, Baltimore County, MD Harvard Mineralogical Museum Collection Photo by Jake Slagle
CHALCOTRICHITE (Photomicrograph) Bare Hills Copper Mine (downstream from long covered dumps) Baltimore City, Maryland Collected and photographed by Jake Slagle
MAGNETITE Bare Hills Copper Mine, Baltimore County, Maryland Collection of Joseph F. Schreiber, Jr Photo by Jake Slagle
MAGNETITE in STEATITE Bare Hills Copper Mine, Balitmore County, MD Collection of Jake Slagle Photo by Jake Slagle
APATITE (Historic) Jones Falls Quarries, Baltimore City Maryland Collection of Jake Slagle Photograph by Jake Slagle
CHABAZITE Jones Falls, Baltimore City, Maryland Collection of Fred J. Parker Photo by Jake Slagle
CHABAZITE (micromount) Jones Falls, Baltimore, Maryland Harvard Mineralogical Museum Micromount Collection Photomicrograph by Jake Slagle
HEULANDITE (Micromount) Jones Falls Quarry, Baltimore City, MD Harvard Mineralogical Museum Micromount Collection Photomicrograph by Jake Slagle
LAUMONTITE Woodberry Trap Quarry Collection of Jake Slagle Photograph by Jake Slagle
IRIDESCENT SIDERITE Arbutus Canyon, Baltimore Maryland Collection of Bob Eberle Photograph by Jake Slagle
ALMANDINE (Garnet Family) Arundel Gneiss Quarry, Baltimore County Maryland Courtesy Collection of John S. White Photo by John S. White
CHROMITE Bare Hills, Baltimore County Maryland Harvard Mineralogical Museum Collection Photo by Jake Slagle
ALMANDINE (Garnet Family) Blue Mount Trap Quarry, Baltimore County, MD Collection of Jake Slagle Photo by Jake Slagle
GOETHITE The Caves, Baltimore County, MD Collection of Jake Slagle Photo by Jake Slagle
TREMOLITE after DIOPSIDE Cromwell Valley, Baltimore County, MD Photo by Jake Slagle
ALLANITE in GNEISS Gunpowder Quarry, Baltimore County, Maryland Collection of Dr. Joseph F. Schreiber, Jr. Photo by Jake Slagle
ALMANDINE (Garnet Family) Gunpowder Quarry, Baltimore County, Maryland Collection of Dr. Joseph F. Schreiber, Jr. Photo by Jake Slagle
ALMANDINE (Garnet Family) Hollofield Quarry, Baltimore County, Maryland Collection of Dr. Joseph F. Schreiber, Jr. Photo by Jake Slagle
GOETHITE near Oregon Ridge, Baltimore County, Maryland Collection of Bob Eberle Photo by Jake Slagle
ZOISITE Powder Shaft, Baltimore County, Maryland Collection of Jake Slagle Photo by Jake Slagle
PYRITE near Valley View Farms, Baltimore County, Maryland Collection of John Vanko Photo by Jake Slagle
PYROMORPHITE Baltimore County, Maryland Collection of Fred Parker Photo by Jake Slagle
ILMENITE near Liberty Reservoir: Baltimore County, Maryland Collection of Jake Slagle Photo by Jake Slagle
BLADED KYANITE near Reisterstown, Baltimore County, Maryland Collection of Jake Slagle Photo by Jake Slagle
HYALITE OPAL TIPPED DRUSY QUARTZ Rt. 70 Construction, north side, Baltimore County, MD Collection of Bob Eberle Photo by Jake Slagle
RED QUARTZ (microcrystals) Soldiers Delight, Baltimore County, Maryland Collection of Jake Slagle Photo by Jake Slagle
CHALCOPYRITE AND CALCITE Texas Quarry near Cockeysville, Baltimore Cy., MD Collection of Fred Parker Photo by Jake Slagle
DRAVITE (Tourmaline Family) Texas Quarry, Baltimore County, Maryland Courtesy, Collection of John S. White Photograph by John S. White
PHLOGOPITE (Mica Family) Texas, Baltimore County, Maryland Courtesy Collection of Bob Eberle Photo by Jake Slagle
PYRITE Texas Quarry, Baltimore County, Maryland Photograph by Jake Slagle
SCAPOLITE Texas Quarry, near Cockeysville, Baltimore County, MD: Collection of Jake Slagle, Photo by Jake Slagle
WERNERITE Harry T. Campbell (Now Texas LaFarge) Quarry, Cockeysville, Baltimore County Maryland: Collection of Joseph F. Schreiber, Jr.: Photo by Jake Slagle
RUTILE West Loch Raven Reservoir, Baltimore County, MD Photograph by Jake Slagle
DOUBLY TERMINATED MILKY QUARTZ near Gamber, Carroll County, Maryland Collection of Harold D. Levey Photograph by Jake Slagle
CORUNDUM Near Henryton, Carroll County, Maryland Courtesy of Bob Conkwright, Jr. Photograph by Jake Slagle
Carrollite (photomicrograph) Patapsco Mine, Carroll County, Maryland Photo by Jake Slagle Collection of Jake Slagle
Carrollite in matrix: Patapsco Mine, Carroll County, Maryland Photograph by Jake Slagle Collection of Jake Slagle
CALCITE Lehigh Portland Cement Quarry, Union Bridge, Carroll Cy., MD Collection of Jake Slagle Photograph by Jake Slagle
CALCITE Lehigh Portland Cement Quarry, Union Bridge, Maryland Collection of Jake Slagle Photo by Jake Slagle
CALCITE Lehigh Portland Cement Quarry Union Bridge, Carroll County, Maryland Collection of Fred Parker Photograph by Jake Slagle
MALACHITE on CALCITE (Photomicrograph) Lehigh Portland Cement Quarry Union Bridge, Carroll County, Maryland Collection of Jake Slagle Photomicrograph by Jake Slagle
MALACHITE Lehigh Portland Cement Quarry Union Bridge, Carroll County, Maryland Collection of Fred J. Parker Photograph by Jake Slagle
CERUSSITE Lehigh Portland Cement Quarry, Carroll County, MD Collection of Jake Slagle Photo by Jake Slagle
WULFENITE (Macrophotograph) Lehigh Portland Cement Quarry Union Bridge, Carroll County, Maryland Collection of JakeSlagle Photograph by Jake Slagle
WULFENITE with CERUSSITE (Photomicrograph) Lehigh Portland Cement Quarry Union Bridge, Carroll County, Maryland Collection of Jake Slagle Photomicrogaph by Jake Slagle
WULFENITE (Photomicrograph) Lehigh Portland Cement Quarry Union Bridge, Carroll County, Maryland Collection of Jake Slagle Photo by Jake Slagle
ALBITE Medford Quarry, Carroll County, Maryland Collection of Jake Slagle Photo by Jake Slagle
AURICHALCITE Medford Quarry, Carroll County, Maryland Collection of Jake Slagle Photo by Jake Slagle
CALCITE Medford Quarry, Carroll County, Maryland Colection of Jake Slagle Photo by Jake Slagle
CALCITE Medford Quarry Carroll County, Maryland Collection of Jake Slagle Photo by Jake Slagle
CALCITE (coated with manganese oxide) Redland Genstar Medford Quarry Carroll County, Maryland Collection of Jake Slagle Photo by Jake Slagle
CALCITE Medford Quarry Carroll County, Maryland Collection of Fred J. Parker Photo by Jake Slagle
CALCITE Medford Quarry, Carroll County, Maryland Collection of Jake Slagle Photo by Jake Slagle
CERUSSITE Medford Quarry, Carroll County, Maryland Collection of Jake Slagle Photo by Jake Slagle
CHALCOPYRITE AND BORNITE Medford Quarry, Carroll County, Maryland Collection of Bob Eberle Photo by Jake Slagle
GALENA (Spinel Twin) Medford Quarry, Carroll County, Maryland Collection of Bob Eberle Photo by Jake Slagle
LANTHANITE (Photomicrograph) Medford Quarry, Carroll County, Maryland Collection of Fred Parker Photo by Jake Slagle
MARBLE Medford Quarry, Carroll County, Maryland Collection of Bob Eberle Photo by Jake Slagle
SPHALERITE Saprolite Zone, Medford Quarry, Carroll Cy., MD Collection of Jake Slagle Photo by Jake Slagle
SPHALERITE PARAMOPH AFTER WURTZITE Medford Quarry, Carroll County, Maryland Collection of Bob Eberle Photo by Jake Slagle
GAHNITE (photomicrograph) Mineral Hill Mine, Carroll County, Maryland Collection of Fred J. Parker Photo by Jake Slagle
GOLD Sykesville, Carroll County, Maryland Collection of Fred J. Parker Photo by Jake Slagle
LINNAEITE-SIEGENITE and CHALCOPYRITE Sykesville, Carroll County, Maryland Collection of Bob Eberle Photo by Jake Slagle
MALACHITE Springfield Mine, Carroll County, Maryland Collection of Fred Parker Photo by Jake Slagle
KAOLINITE Iron Hill, Cecil County, Maryland Photograph by Jake Slagle Harvard Mineralogical Museum Collection
CHALCOPYRITE Maryland Materials Quarry, Cecil County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
EPIDOTE Maryland Materials Quarry, Cecil County, Maryland Collection of John S. White Photo by John S. White
GRAPHITE PLATES IN FELDSPAR Maryland Materials Quarry, Cecil County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
HEULANDITE Maryland Materials Quarry, Northeast, Cecil County, MD Collection of Jake Slagle Photograph by Jake Slagle
SCHORL (Tourmaline Family) Maryland Materials Quarry, Cecil County, MD Collection of Jake Slagle Photo by Jake Slagle
SCHORL (Tourmaline Family) Maryland Materials Quarry, Cecil County, Maryland Collection of John S. White Photograph by John S. White
STILBITE Northeast, Cecil County, Maryland Collection of John S. White Photograph by John S. White
SPESSARTINE AND SCHORL Roadcut for North Edgwood Drive near Appleton Rd. Cecil County, Maryland University of Delaware Mineral Museum Photograph by Jake Slagle
ANTIGORITE State Line Chrome Pits, Cecil County, Maryland Collection of Bob Eberle Photo by Jake Slagle
WILLIAMSITE Lowe's Mine, State Line Pits, Cecil County, Maryland Collection of John S.White Photo by John S. White
GENTHITE Cecil County, Maryland Ex-Alvin V. Filer, Jr. Auburn, University Collection of Jake Slagle Photograph by Jake Slagle
CHROMIAN CLINOCHLORE Cecil County, Maryland nr. Texas, PA Harvard Mineralogical Museum Photograph by Jake Slagle
CHROMIAN CLINOCHLORE (photomicrograph) known also as kammerite, rhodochrome, penninite, japanite, miskeyite Cecil County Maryland Harvard Mineralogical Museum Collection Photo by Jake Slagle
FLUORAPATITE Greenspring (McMahon Quarry) Baltimore County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
FADEN QUARTZ Burkittsville, Frederick County, Maryland Collection of Fred Parker Photograph by Jake Slagle
QUARTZ Burkittsville, Frederick County, Maryland Collection of Fred J. Parker Photograph by Jake Slagle
MALACHITE Liberty Mine, Frederick County, Maryland Collection of Fred J. Parker Photograph by Jake Slagle
ANGLESITE Mountain View Lead Mine, Frederick County, Maryland Collection of Jake Slagle Photomicrograph by Jake Slagle
SMITHSONITE Mountain View Lead Mine, Frederick County, Maryland Collection of Jake Slagle Photomicrograph by Jake Slagle
BORNITE Repp Mine, Frederick County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
RUTILE Harford County, Maryland Harvard Mineralogical Museum Collection Photo by Jake Slagle
GOETHITE PSEUDOMORPH after PYRITE Dinning Rutile Prospect, Harford County, Maryland Collection of Harold D. Levey Photograph by Jake Slagle
RUTILE Dinning Rutile Prospect, Harford County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
ILMENITE near Dublin, Harford County, Maryland Collection of Harvard Mineralogical Museum Photograph by Jake Slagle
ILMENITE IN TALC Harford County, Maryland Harvard Mineralogical Museum Collection Photograph by Jake Slagle
MAGNETITE Harford County, Maryland Collection of Fred Parker Photograph by Jake Slagle
TALC Harford County, Maryland Harvard Mineralogical Museum Photograph by Jake Slagle
CHABAZITE and STILBITE Genstar Quarry , Churchville, Harford County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
VESUVIANITE (with minor grossular) Fannie Frost Quarry, Howard County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
MUSCOVITE Old Maryland Mica Mine, Howard County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
BERYL Waterside Project, Howard County, Maryland Collection of Fred Parker Photograph by Jake Slagle
Native Gold in Quartz Maryland Gold Mine Montgomery County, Maryland Courtesty of U.S. National Park Service Photograph by Jake Slagle
GOLD IN QUARTZ Montgomery County Maryland Smithsonian Collection Photographed through glass by Jake Slagle
GOLD Montgomery County, Maryland Specimen measures 8 cm. across from collection at Michigan Tech Photo by George W. Robinson Provided with permission from John S. White
GOLD Great Falls Mine, Montgomery County, Maryland Harvard Mineralogical Museum Collection Photograph by Jake Slagle
GOLD IN QUARTZ Maryland Mine, Montgomery County, Maryland Collection of Fred Parker Photograph by Jake Slagle
ANALCIME in SERPENTINE Hunting Hill Quarry, Montgomery County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
CHALCOCITE rimming DIOPSIDE on CALCITE with GROSSULAR Hunting HIll Quarry, Montgomery County, Maryland Collection of Fred Parker Photograph by Jake Slagle
CLINOZOISITE Hunting Hill Quarry, Montgomery County, Maryland Collection of Jake Slagle Photo by Jake Slagle
COALINGITE Saprolite Zone, Hunting Hill Quarry Montgomery County, Maryland Collection of Jake Slagle Photo by Jake Slagle
COALINGITE CRYSTALS (photomicrocgraph) Hunting Hill Quarry, Rockville, Montgomery Cy., MD Rare---verified by xray diffraction at JMU. Collection of Jake Slagle Photo by Jake Slagle
GROSSULAR, WHITE DIOPSIDE XLS., CLINOCHLORE Fifth Level, Hunting Hill Quarry Montgomery County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
GROSSULAR (Garnet Family) Hunting Hill Quarry, Montgomery County, Maryland Collection of Fred Parker Photograph by Jake Slagle
McGUINNESSITE (micromount) Hunting Hill Quarry, Montgomery County, Maryland Harvard Mineralogical Museum Micromount Collection Photomicrograph by Jake Slagle
McGUINNESSITE Hunting Hill Quarry, Montgromery County, Maryland Collection of Fred Parker Photograph by Jake Slagle
PYRITE (intergrown cubes) on MAGNESITE CRYSTALS Hunting Hill Quarry, Montgomery County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
DESAUTELSITE (photomicrograph) Hunting Hill Quarry, Montgomery Cy., Maryland Harvard Mineralogical Museum collection Photograph by Jake Slagle
OMPHACITE (spongy looking) with DIOPSIDE Xls. Hunting HIll Quarry, Montgomery County, MD Photo by Jake Slagle Collection of Jake Slagle
PREHNITE CRYSTALS Hunting Hill Quarry, Montgomery County, Maryland Collection of Jake Slagle Photo by Jake Slagle
MAGNESITE CRYSTALS Hunting Hill Quarry Rockville, Montgomery County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
SPHENE Hunting Hill Quarry, Montgomery County, Maryland Collection of Fred Parker Photograph by Jake Slagle
VESUVIANITE Hunting Hill Quarry, Montgomery County, Maryland Collection of Fred Parker Photograph by Jake Slagle
XONOTLITE Hunting HIll Quarry, Rockville, Maryland Collection of Jake Slagle Photograph by Jake Slagle
TOCHILINITE Hunting Hill Quarry, Montgomery County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
ROCKBRIDGEITE Greenbelt, Prince Georges County, Maryalnd Harvard Mineralogical Museum Collection Photo by Jake Slagle
"LAUBMANNITE" (discredited as a species name) actually a combination of Dufrenite, Kidwellite, and Beraunite with Rockbridgeite Greenbelt, Prince Georges County, Maryland Collection of Jake Slagle Photo by Jake Slagle
GYPSUM (SELENITE) Fort Washington, Prince Georges Countyh, Maryland Collection of Harold D. Levey Photograph by Jake Slagle
GYPSUM CRYSTALS ON SIDERITE Muirkirk Iron Ore Banks, Prince Georges Cy., MD Collection of Jake Slagle Photograph by Jake Slagle
VIVIANITE Wheeler Road Cut, Prince Georges County, MD Collection of Harvard Mineralogical Museum Photograph by Jake Slagle
GYPSUM (SELENITE) Chancellors Point, St. Mary's County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
DOLOMITE and CALCITE Boonsboro, Washington County, Maryland Collection of Jake Slagle Photograph by Jake Slagle
BARITE Pinesburg Quarry, Washington Cy., Maryland Collection of Fred Parker Photo by Jake Slagle
CALCITE Pinesburg Quarry, Washington County, Maryland Collection of Jake Slagle Photo by Jake Slagle
FLUORITE Pinesburg Quarry, Washington County, Maryland Collection of Fred Parker Photo by Jake Slagle
STRONTIANITE near Sideling Hill, Washington County, MD Photo by Jake Slagle
QUARTZ AND DOLOMITE Pinesburg Quarry, Washington County, Maryland Collection of Fred Parker Photo by Jake Slagle
