Minerals from Mid-Atlantic, USA

Jordanite with Sphalerite from Keystone Mine, Blair County, Pennsylvania

Kaolinite with dendritic patterns from Vance County, North Carolina

Kasolite from Lehigh River west shore, Penn Haven Junction, Carbon County, Pennsylvania

Kidwellite and Strengite from Indian Mountain, Cherokee County, Alabama

Kimberlite from Tanoma Mine, Dixonville Dike, Indiana County, Pennsylvania

Kimberlite from Barr-Slope Mine, Dixonville Dike, Indiana County, Pennsylvania

Kimberlite from Gates-Adah Mine, Middle Run, Fayette County, Pennsylvania

Kimberlite from Gates-Adah Mine, Middle Run, Fayette County, Pennsylvania

Kutnohorite from Moncure Quarry, Lee County, North Carolina

Kyanite from Balsam Gap, North Carolina

Kyanite from Balsam Gap, near Spruce Pine, North Carolina

Kyanite from Buncombe County, North Carolina

Kyanite from Kyle, Macon County, North Carolina

Kyanite from near Celo, Yancey County, North Carolina

Kyanite from Spruce Pines, Mitchell County, North Carolina

Kyanite from White Horse Hotel, Delaware County, Pennsylvania

Kyanite from Burnsville-Celo region, Yancey County, North Carolina

Kyanite from Delaware County, Pennsylvania

Kyanite from White Horse Hotel, Delaware County, Pennsylvania

Kyanite from Willis Mountain Kyanite Mine, Dylwinn, Buckingham County, Virginia

Kyanite from Delaware County, Pennsylvania

Kyanite from Piedmont Mountains, Carroll County, Virginia

Kyanite from Baker Mountain, Prince Edward County, Virginia

Kyanite and Almandine Garnet from Devil's Pool, Wissahickon Creek, Philadelphia, Philadelphia County, Pennsylvania

Kyanite and Biotite in Quartz from Mitchell County, North Carolina

Kyanite in Albite-Quartz from near Celo, Yancey County, North Carolina

Kyanite in Quartz from Cleveland County, North Carolina

Kyanite in Quartz from Meeper Mine, Buncombe Coounty, North Carolina

Kyanite in Quartz from Baker Mountain, Prince Edward County, Virginia

Kyanite in Quartz from Macon County, North Carolina

Kyanite in Quartz from Lynchburg, Campbell County, Virginia

Kyanite in Quartz from Buncombe County, North Carolina

Kyanite in Quartz from near Celo, Yancey County, North Carolina

Kyanite in Quartz from Prospect Park, Ridley Township, Delaware County, Pennsylvania

Kyanite in Quartz from Baker Mountain Kyanite Mine, Pamplin City, Virginia

Kyanite with Biotite from Owings Mills, Baltimore County, Maryland

Kyanite with Pyrite from Cullen, Charlotte County, Virginia

Kyanite with Pyrite from Cullen, Charlotte County, Virginia

Kyanite with Pyrite from Cullen, Charlotte County, Virginia

Kyanite with Pyrite from Cullen, Charlotte County, Virginia

Labradorite from Saranac Lake, Franklin County, New York

Laumontite on Hydroxyapophyllite-(K) (formerly apophyllite-(KOH)) from Virginia Trap Rock Quarry, Loudoun County, Virginia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Gaston County, North Carolina

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite from Graves Mountain, Lincoln County, Georgia

Lazulite (Twin Crystals) from Graves Mountain, Lincoln County, Georgia

Lazulite (Twin Crystals) from Graves Mountain, Lincoln County, Georgia

Lazulite (twinned crystals) from Graves Mountain, Lincoln County, Georgia

Limonite (stalactitic) from Lancaster County, Pennsylvania

Limonite and Goethite from Emmaus, Lehigh County, Pennsylvania

Limonite pseudomorph after Pyrite from Ransun, North Carolina

Limonite pseudomorph after Pyrite from Aquedale, North Carolina

Limonite pseudomorph after Pyrite from Lancaster County, Pennsylvania

Limonite pseudomorph after Pyrite from Porter, Stanly County, North Carolina

Limonite pseudomorph after Pyrite from Fruitville Pike locality, Lancaster County, Pennsylvania

Limonite pseudomorph after Pyrite from Fruitville Pike locality, Lancaster County, Pennsylvania

Limonite pseudomorphs after Pyrite from Lancaster County, Pennsylvania

Limonite pseudomorphs after Pyrite from Lancaster County, Pennsylvania

Limonite pseudomorphs after Pyrite from Lancaster County, Pennsylvania

Limonite pseudomorphs after Pyrite from near Wrightsville, York County, Pennsylvania

Limonite pseudomorphs after Pyrite from Porter, Stanly County, North Carolina

Limonite pseudomorphs after Pyrite from Porter, Stanly County, North Carolina

Limonite pseudomorphs after Pyrite from Fruitville Pike locality, Lancaster County, Pennsylvania

Limonite pseudomorphs after Pyrite from Gold panning prospect, Fanning County, Georgia

Limonite pseudomorphs after Pyrite from Fruitville Pike locality, Lancaster County, Pennsylvania

Limonite pseudomorphs after Pyrite from Fruitville Pike locality, Lancaster County, Pennsylvania

Limonite pseudomorphs after Pyrite from Fruitville Pike locality, Lancaster County, Pennsylvania

Limonite pseudomorphs after Pyrite from Fruitville Pike locality, Lancaster County, Pennsylvania

Limonite pseudomorphs after Pyrite from Fruitville Pike locality, Lancaster County, Pennsylvania

Limonite pseudomorphs after Pyrite from Fruitville Pike locality, Lancaster County, Pennsylvania

Limonite pseudomorphs after Siderite with Rutile from Boiling Springs, Cleveland County, North Carolina

Limonite var. Pipe Ore from Fleetwood, Berks County, Pennsylvania

Linarite on Quartz with Chrysocolla from Ecton Mine, Perkiomen District, Audubon, Montgomery County, Pennsylvania

Linarite with Chrysocolla from Ecton Mine, Perkiomen District, Audubon, Montgomery County, Pennsylvania

Magnesiochromite with Clinochlore from Delight Quarry, Reisertown, Baltimore County, Maryland

Magnetite from Laurel Hill (Snake Hill) Quarry, Secaucus, Hudson County, New Jersey

Magnetite from Broad Creek, Whiteford, Maryland

Magnetite from French Creek Iron Mine, St. Peters, Chester County, Pennsylvania

Magnetite from Grace Mine, Morgantown, Berks County, Pennsylvania

Magnetite from Cornwall Iron Mine, Lebanon County, Pennsylvania

Magnetite from French Creek Iron Mines, St. Peters, Chester County, Pennsylvania

Magnetite from French Creek Iron Mines, St. Peters, Chester County, Pennsylvania

Magnetite from Cornwall Iron Mines, Cornwall, Lebanon County, Pennsylvania

Magnetite from old talc mine near Pilottown, Maryland

Magnetite from Cornwall Iron Mines, Cornwall, Lebanon County, Pennsylvania

Magnetite from Grace Mine, 20 Panel, Drift 200, Morgantown, Berks County, Pennsylvania

Magnetite from French Creek Iron Mines, St. Peters, Chester County, Pennsylvania

Magnetite from Bell's Mill Road, near Wissahickon Creek, Chestnut Hill, Philadelphia, Philadelphia County, Pennsylvania

Magnetite from Bell's Mill Road, near Wissahickon Creek, Chestnut Hill, Philadelphia, Philadelphia County, Pennsylvania

Magnetite from Bell's Mill Road, near Wissahickon Creek, Chestnut Hill, Philadelphia, Philadelphia County, Pennsylvania

Magnetite from Grace Mine, Morgantown, Berks County, Pennsylvania

Magnetite from Cornwall Iron Mines, Cornwall, Lebanon County, Pennsylvania

Magnetite (dodecahedral crystals) from Jones Mine (Jones Good Luck Mine ), Hopewell Furnace District, Caernarvon Township, Berks County, Pennsylvania

Magnetite in Chlorite from Baltimore County, Maryland

Magnetite in Cuprite from Cornwall Iron Mines, Cornwall, Lebanon County, Pennsylvania

Magnetite with Actinolite var. Byssolite from French Creek Iron Mines, St. Peters, Chester County, Pennsylvania

Magnetite with Actinolite var. Byssolite from French Creek Iron Mines, St. Peters, Chester County, Pennsylvania

Magnetite with Actinolite var. Byssolite from French Creek Iron Mines, St. Peters, Chester County, Pennsylvania

Magnetite with Clinochlore from Penn-MD Quarry, near Peach Bottom, Fulton Township, Lancaster County, Pennsylvania

Magnetite with Pyrite from Cornwall Iron Mines, Cornwall, Lebanon County, Pennsylvania

Magnetite with Tremolite and minor Pyrite from Grace Mine, Morgantown, Berks County, Pennsylvania

Magnetite with Tremolite and minor Pyrite from Grace Mine, Morgantown, Berks County, Pennsylvania

Magnetite, Pyrite, Calcite with Byssolite inclusions from French Creek Iron Mine, St. Peters, Chester County, Pennsylvania

Malachite from Jones Mine, Caernarvon Township, Berks County, Pennsylvania

Malachite from Blue Wing Mine, near Blue Wing Church, Virgilina, Granville County, North Carolina

Malachite from Jones Mine, Caernarvon Township, Berks County, Pennsylvania

Malachite from French Creek Iron Mines, St. Peters, Chester County, Pennsylvania

Malachite from Cornwall Iron Mines, Cornwall, Lebanon County, Pennsylvania

Malachite from Union Bridge, Carroll County, Maryland

Malachite and Chrysocolla from Cornwall Iron Mines, Cornwall, Lebanon County, Pennsylvania

Malachite and Cuprite from Cornwall, Lebanon County, Pennsylvania

Malachite on Quartz from King of Prussia, Montgomery County, Pennsylvania

Malachite on Quartz from Blue Wing Mine, South Prospect Shaft, Granville County, North Carolina

Malachite, Magnetite, Calcite, Pyrite from French Creek Iron Mines, St. Peters, Chester County, Pennsylvania

Manganese-oxide Nodule from Blake Plateau, east of Georgia coast, Atlantic Ocean

Marcasite from Starksville, Mississippi

Margarite from Unionville Corundum Mine, Corundum Hill, Chester County, Pennsylvania

Margarite from Corundum Hill, Unionville, Chester County, Pennsylvania

Massicot from Wytheville, Virginia

Matulaite from Bachman Mine, Hellertown, Northampton County, Pennsylvania (Type Locality for Matulaite)

Matulaite from Bachman Mine, Hellertown, Northampton County, Pennsylvania (Type Locality for Matulaite)

Mcguinnessite and Hydromagnesite from Rockville Quarry, Montgomery County, Maryland

Mesolite on Prehnite from Upper New Street Quarry, Paterson, Passaic County, New Jersey

Metaswitzerite (altered Switzerite) from Foote Mine, Kings Mountain, Cleveland County, North Carolina (Type Locality for Metaswitzerite and Switzerite)

Metaswitzerite (altered Switzerite) from Foote Mine, Kings Mountain, Cleveland County, North Carolina (Type Locality for Metaswitzerite and Switzerite)

Metaswitzerite (altered Switzerite) from Foote Mine, Kings Mountain, Cleveland County, North Carolina (Type Locality for Metaswitzerite and Switzerite)

Metaswitzerite (altered Switzerite) from Foote Mine, Kings Mountain, Cleveland County, North Carolina (Type Locality for Metaswitzerite and Switzerite)

Metaswitzerite (altered Switzerite) from Foote Mine, Kings Mountain, Cleveland County, North Carolina (Type Locality for Metaswitzerite and Switzerite)

Metaswitzerite (altered Switzerite) from Foote Mine, Kings Mountain, Cleveland County, North Carolina (Type Locality for Metaswitzerite and Switzerite)

Metaswitzerite (Switzerite altered by dehydration) from Foote Mine, Kings Mountain, Cleveland County, North Carolina (Type Locality for Metaswitzerite and Switzerite)

Microcline from Deshong's Quarry, Leiperville, Delaware County, Pennsylvania

Microcline from Deshong's Quarry, Leiperville, Delaware County, Pennsylvania

Microcline from Deshong's Quarry, Leiperville, Delaware County, Pennsylvania