FMF Minerals Gallery

1.3-mm sphalerite. Bluffton Stone Co. quarry, Bluffton, Allen Co., Ohio. (Author: John Jaszczak)

1.3-mm sphalerite. Bluffton Stone

Coarse spherical aggregate of graphite crystals partially dissolved from enclosing calcite matrix, with associated unidentified silicates. (1.2-mm diameter) (Author: John Jaszczak)

Coarse spherical aggregate of grap

Compact spherical aggregate of graphite crystals partially dissolved from enclosing calcite matrix. (1-mm diameter) (Author: John Jaszczak)

Compact spherical aggregate of gra

Copper Great Sand Bay, Eagle Harbor, Lake Superior, Michigan close up of what appears to be an octahedral crystal but is probably a dodecahedron... (Author: John Jaszczak)

Copper Great Sand Bay, Eagle Harbo

Copper Great Sand Bay, Eagle Harbor, Lake Superior, Michigan 3x4 cm (Author: John Jaszczak)

Copper Great Sand Bay, Eagle Harbo

Copper possible pseudomorph after laumontite. (Author: John Jaszczak)

Copper possible pseudomorph after

Copper, Calcite, Datolite. Quincy mine, Hancock, MI. (Author: John Jaszczak)

Copper, Calcite, Datolite. Quincy

Graphite with spiral and stellar overgrowths. Gouverneur Talc Company #4 quarry, Harrisville, NY. (Author: John Jaszczak)

Graphite with spiral and stellar o

Twisted crystal of cinnabar (~1 mm) in matrix; exposed from enclosing calcite. Huron River Uranium Prospect, Baraga Co., MI. (Author: John Jaszczak)

Twisted crystal of cinnabar (~1 mm