SULFUR Martin Mountain near Cumberland (Allegany County), Jake Slagle Collection, Jake Slagle photographer

CELESTINE on LIMESTONE Martin Mountain near Cumberland (Alleghany County), Jake Slagle Collection, Jake Slagle photographer

MILLERITE Frostburg Fire Clay Pit (Allegany County), Harold Levey Collection , Jake Slagle photographer

BARYTE Frostburg Fire Clay Pit (Allegany County), Harold Levey Collection , Jake Slagle photographer

BARYTE on SIDERITE Frostburg Fire Clay Pit (Allegany County), Harold Levey Collection , Jake Slagle photographer