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Ken Hollmann

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Anhydrite, Magnetite, Sphalerite image

Anhydrite, Magnetite, Sphalerite

New York State Museum

Calcite, Pyrite image

Calcite, Pyrite

New York State Museum

Calcite image

New York State Museum

Calcite image

New York State Museum

Calcite image

New York State Museum

Magnetite image

New York State Museum

Pyrite image

New York State Museum

Sphalerite image

New York State Museum

Sphalerite (Spinel twin) image

Sphalerite (Spinel twin)

New York State Museum

Grossular image

Almandine image

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