TOPAZ Alto Dale Farm, Cradocks Lane and Reisterstown Road (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

IRIDESCENT SIDERITE Arbutus Canyon (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

ALLANITE Arundel Quarry (Baltimore County), Joseph F. Schreiber collection, Jake Slagle photographer

ALMANDINE (Garnet Group) Arundel Gneiss Quarry (Baltimore County), John S. White Collection, John S. White photographer

ALMANDINE (Garnet Group) Arundel Gneiss Quarry (Baltimore County), Joseph F. Schreiber collection, Jake Slagle photographer

CHALCEDONY Bare Hills Serpentine Barrens (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

CHROMITE Bare Hills (Baltimore County), Harvard Mineralogical Museum Collection, Jake Slagle photographer

SEPIOLITE (Meerschaum) Bare Hills Serpentine Barrens (Baltimore County), Natural History Society of Maryland Collection, Jake Slagle photographer

ALMANDINE (Garnet Group) Blue Mount Trap Quarry (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

BRUCITE Blue Mount Trap Quarry (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

Hematite Abandoned Iron Pit nr. Blue Mount, Collected by Bernie Emery, Photograph by Jake Slagle

GOETHITE: The Caves, Baltimore County, Maryland; collected by Jake Slagle, Collection of Jake Slagle; Photgrapher Jake Slagle

DRUSY QUARTZ I -70 Construction, North Side (Baltimore County), Bob Eberle Collection, Jake Slagle photographer

TREMOLITE Gilmor Quarry (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

TREMOLITE Gilmor Quarry (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

BERYL GREENSPRING (McMahon) Quarry (Baltimore County ), Jake Slagle Collection, Jake Slagle photographer

GARNET, SCAPOLITE GREENSPRING (McMahon) Quarry (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

GOETHITE AND QUARTZ GREENSPRING (McMahon) Quarry (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

ALMANDINE (Garnet Group) Hollofield Quarry (Baltimore County), Joseph F. Schreiber collection, Jake Slagle photographer

ENSTATITE Hollofield Quarry (Baltimore County), Natural History Society of Maryland Collection, Jake Slagle photographer

PYRITE Near Valley View Farms (Baltimore County), John Vanko Collection , Jake Slagle photographer

ILMENITE near Liberty Reservoir (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

SPHENE Milford Trap Quarry Baltimore County, Maryland Natural History Society of Maryland Collection Jake Slagle Photographer

RUTILE West Loch Raven Reservoir (Baltimore County), Jake Slagle photographer

FLUORAPATITE GREENSPRING (McMahon) Quarry (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

ALMANDINE (Garnet Group) McComas Ore Banks, nr. Bluemount (Baltimore County), Fred Parker Collection, Jake Slagle photographer

CHLORITE (Rosetted Crystals) Milford Trap Quarry Baltimore County Natural History Society of Maryland Collection Jake Slagle: Photographer

CLINOZOISITE Milford Trap Quarry Baltimore County, Maryland Natural History Society of Maryland Collection Jake Slagle Photographer

KAOLINITE Milford Trap Quarry Baltimore County, Maryland Natural History Society of Maryland Collection Jake Slagle Photographer

LAUMONTITE Milford Trap Quarry Baltimore County, Maryland Natural History Society of Maryland Collection Jake Slagle Photographer

MOLYBDENITE Milford Trap Quarry, Baltimore County, Maryland Natural History Society of Maryland Collection Jake Slagle: Photographer

PREHNITE Milford Trap Quarry Baltimore County, Maryland Natural History Society of Maryland Collection Jake Slagle Photographer

PYRRHOTITE Milford Trap Quarry Baltimore County, Maryland Natural History Society of Maryland Collection Jake Slagle Photographer

SCOLECITE Milford Trap Quarry Baltimore County, Maryland Natural History Society of Maryland Collection Jake Slagle Photographer

TABULAR QUARTZ Nash Farm (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

ALMANDINE (Garnet Group) Construction Rt. 795, Owings Mills (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

GOETHITE Oregon Ridge near Hunt Valley (Baltimore County), Bob Eberle Collection, Jake Slagle photographer

ZOISITE Powder Mill Shaft (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

KYANITE Near Reisterstown (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

ANTIGORITE (var.)PICROLITE Soldiers Delight (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

ARFVEDSONITE XLS. in quartz Delight Quarry, Soldier's Delight (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

CHROMIAN CLINOCHLORE Soldiers Delight (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

QUARTZ Soldiers Delight (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

CHALCOPYRITE on CALCITE Texas Quarry nr. Cockeysville (Baltimore County), Fred Parker Collection, Jake Slagle photographer

DRAVITE (Tourmaline Group) Texas Quarry nr. Cockeysville (Baltimore Couny), Fred Parker Collection, Jake Slagle photographer

FLUORAITE, DOLOMITE Texas Quarry nr. Cockeysville (Baltimore County), Natural History Society of Maryland Collection, Jake Slagle photographer

PHLOGOPITE Texas Quarry nr. Cockeysville (Baltimore County), Bob Eberle Collection, Jake Slagle photographer

SCAPOLITE Texas Quarry nr. Cockeysville (Baltimore County), Joseph F. Schreiber collection, Jake Slagle photographer

SCAPOLITE Texas Quarry nr. Cockeysville (Baltimore County), Jake Slagle Collection, Jake Slagle photographer

PYRITE Texas Quarry nr. Cockeysville (Baltimore County), Jake Slagle photographer

SPHENE (Titanite) Texas Quarry nr. Cockeysville (Baltimore County), Natural History Society of Maryland Collection, Jake Slagle photographer

PYROMORPHITE Western Baltimore County (Baltimore County), Fred Parker Collection, Jake Slagle photographer