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Ken Hollmann

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Anhydrite from Empire State No. 2 Mine, Balmat, New York, USA image

Anhydrite from Empire State No. 2 Mine, Balmat, New York, USA

New York State Museum

Calcite from Pierrepont Mine image

Calcite from Pierrepont Mine

New York State Museum

Calcite from Hyatt mine, Talcville, Edwards, St. Lawrence County, New York, USA image

Calcite from Hyatt mine, Talcville, Edwards, St. Lawrence County, New York, USA

New York State Museum

Calcite from Hyatt mine, Talcville, Edwards, St. Lawrence County, New York, USA image

Calcite from Hyatt mine, Talcville, Edwards, St. Lawrence County, New York, USA

New York State Museum

Calcite from Balmat mine at Balmat, Fowler, St. Lawrence County, New York, USA image

Calcite from Balmat mine at Balmat, Fowler, St. Lawrence County, New York, USA

New York State Museum

Magnetite from Empire State No. 4 Mine, Balmat, New York, USA image

Magnetite from Empire State No. 4 Mine, Balmat, New York, USA

New York State Museum

Pyrite from Balmat mine at Balmat, Fowler, St. Lawrence County, New York, USA image

Pyrite from Balmat mine at Balmat, Fowler, St. Lawrence County, New York, USA

New York State Museum

Sphalerite from Balmat mine at Balmat, Fowler, St. Lawrence County, New York, USA image

Sphalerite from Balmat mine at Balmat, Fowler, St. Lawrence County, New York, USA

New York State Museum

Sphalerite from Pierrepont Mine image

Sphalerite from Pierrepont Mine

New York State Museum

Almandine from Berkshire County, Massachusetts, USA image

Almandine from Berkshire County, Massachusetts, USA