Grace Mine, Morgantown, Berks Co., Pennsylvania, USA

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Anhydrite : CaSO₄
	Grace Mine, Morgantown, Berks Co., Pennsylvania, USA A pale pinkish lilac colored crystal of Anhydrite in a white Gypsum matrix from Grace Mine, Morgantown, Berks Co., Pennsylvania. Specimen size: 7 x 5.5cm. From the PA Annex of my personal collection, acquired in 2004.
© M.Heintzelman	Photo ID: 98477 View Count: 207
Apophyllite
	Grace Mine, Morgantown, Berks Co., Pennsylvania, USA Plate of colorless, and largely transparent, blocky crystals of Apophyllite on a thin chlorite rich matrix. Specimen from Grace Mine, Morgantown, Berks Co., Pennsylvania. Specimen size: 9 x 8.5cm. From the PA Annex of my personal collection, acquired in 2007.
© M.Heintzelman	Photo ID: 169044 View Count: 136
Clinochlore : (Mg,Fe²⁺)₅Al[(OH)₈\|AlSi₃O₁₀]
	Grace Mine, Morgantown, Berks Co., Pennsylvania, USA Green foliaeted crystal of Clinochlore from Grace Mine, Morgantown, Berks Co., Pennsylvania. Although a large and relatively undistorded specimen for the locale, smaller, more finely formed and sharply terminated hexagonal crystals are well noted from this mine. Specimen size: 3 x 2.7cm. From the PA Annex of my personal collection, acquired in ...
© M.Heintzelman	Photo ID: 15517 View Count: 382
Hematite (Var: Specularite) : Fe₂O₃
	Grace Mine, Morgantown, Berks Co., Pennsylvania, USA Specimen size measures 10cm. From the John Ward Collection.
© Melissa Ward Carroll	Photo ID: 156736 View Count: 154
Magnetite : Fe²⁺Fe³⁺₂O₄
	Grace Mine, Morgantown, Berks Co., Pennsylvania, USA Large single crystal of octahedral magnetite with minor matrix. The crystal surfaces is composed of many parallel crystal faces resulting in a stepped surface. No damage. Overall size of mineral specimen: 25x24x22 mm. Size of individual crystals: 22 mm.
© 2002 John H. Betts	Photo ID: 4524 View Count: 471
Magnetite : Fe²⁺Fe³⁺₂O₄
	Grace Mine, Morgantown, Berks Co., Pennsylvania, USA Complex modified dodecahedral crystals of Magnetite from Grace Mine, Morgantown, Berks Co., Pennsylvania. A well crystalized miniature, but lacking the complex stepped surface development, often accented by white amphibole, for which the mine is best known. Specimen size: 5.5 x 4cm. From the PA Annex of my personal collection, acquired in 2006.
© M.Heintzelman	Photo ID: 98475 View Count: 414
Magnetite : Fe²⁺Fe³⁺₂O₄, Actinolite-Tremolite Series
	Grace Mine, Morgantown, Berks Co., Pennsylvania, USA Large piece of magnetite ore that escaped processing. Massive magnetite with little matrix. Specimen is 14 inches horizontally. The specimen weighs 11.6 kg. Collected by Mark J. Sigouin in 2007 from mine spoils.
© Mark J. Sigouin	Photo ID: 144128 View Count: 139
Magnetite : Fe²⁺Fe³⁺₂O₄, Actinolite-Tremolite Series
	Grace Mine, Morgantown, Berks Co., Pennsylvania, USA Alternating bands of Magnetite in Tremolite-Actinolite Matrix. Collected from the spoils of this underground ore deposit. Much of the magnetite in the spoils is massive and layered with matrix. Specimen is 3 inches in the horizontal. Collected by Mark J. Sigouin in 2006.
© Mark J. Sigouin	Photo ID: 144110 View Count: 133
Pyrite : FeS₂
	Grace Mine, Morgantown, Berks Co., Pennsylvania, USA Silver di-pyramidal crystals of Pyrite in a matrix of golden massive pyrite with minor granular Magnetite. Specimen from Grace Mine, Morgantown, Berks Co, Pennsylvania. Specimen size: 7.5 x 4.5cm. From the PA Annex of my personal collection, acquired in 2005.
© M.Heintzelman	Photo ID: 52318 View Count: 279
Pyrite : FeS₂, Actinolite (Var: Byssolite) : ☐Ca₂(Mg,Fe²⁺)₅(Si₈O₂₂)(OH)₂
	Grace Mine, Morgantown, Berks Co., Pennsylvania, USA Silver di-pyramidal crystals of Pyrite in a matrix of pale green Actinolite var. Byssolite. Specimen from Grace Mine, Morgantown, Berks Co, Pennsylvania. Specimen size: 8 x 5.5cm. From the PA Annex of my personal collection, acquired in 2005.
© M.Heintzelman	Photo ID: 52319 View Count: 222