Sepiolite
Goat Hill Magnesia Quarries, West Nottingham Township, Chester County, Pennsylvania, USA
Porcelaneous mass of bone white Sepiolite "Meerschaum" from the Goat Hill Quarry, West Nottingham Township, Chester Co., Pennsylvania. Ex. Don Schmerling collection, via Steve Carter @ Penn Minerals. From the PA annex of my personal collection, acquired in 2013.
© M.Heintzelman