Wikimedi'Òc

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 1 (31208382216).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 2 (31208370866).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 3 (31208349006).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 5 (25761845538).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 4 (25761853378).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 6 (38736759655).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 7 (38924806324).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 8 (39603352622).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 10 (24764851587).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 11 (39603301272).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 9 (24764869617).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 12 (38736692745).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 14 (27855232379).jpg - Ser Amantio di Nicolao

Quartz crystal-lined cavity in flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 13 (38924731684).jpg - Ser Amantio di Nicolao

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 234.jpg - Ser Amantio di Nicolao