James St. John: Calcite crystals (Pugh Quarry, near Custar, Ohio, USA) 1
James St. John: Calcite crystals (Pugh Quarry, near Custar, Ohio, USA) 2
James St. John: Calcite-celestite (Pugh Quarry, Custar, Ohio, USA)
James St. John: Calcite crystals (Pugh Quarry, near Custar, Ohio, USA) 3
James St. John: Calcite crystal (Pugh Quarry, near Custar, Ohio, USA) 4
James St. John: Calcite crystals (Pugh Quarry, near Custar, Ohio, USA) 5
James St. John: Calcite crystals (Pugh Quarry, near Custar, Ohio, USA) 6
James St. John: Calcite crystals (Pugh Quarry, near Custar, Ohio, USA) 7
James St. John: Calcite crystals (Pugh Quarry, near Custar, Ohio, USA) 8
James St. John: Calcite crystals (Pugh Quarry, near Custar, Ohio, USA) 9
James St. John: Celestite (Pugh Quarry, Wood County, Ohio, USA)
James St. John: Calcite crystals (Pugh Quarry, near Custar, Ohio, USA) 10
James St. John: Calcite crystals (Pugh Quarry, near Custar, Ohio, USA) 11
James St. John: Calcite crystals (Pugh Quarry, near Custar, Ohio, USA) 12