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Agate-filled geode (Las Choyas Geode Deposit, near-latest Eocene, ~35 Ma; Chihuahua, Mexico) 14 (31911462034).jpg - Ser Amantio di Nicolao
Garnetite (grossular garnet skarn) (Middle Eocene, 38-40 Ma; Concepcion del Oro Mining District, northeastern Zacatecas, central Mexico) 2 (15939541592).jpg - Ser Amantio di Nicolao
Garnetite (grossular garnet skarn) (Middle Eocene, 38-40 Ma; Concepcion del Oro Mining District, northeastern Zacatecas, central Mexico) 1 (15938239901).jpg - Ser Amantio di Nicolao
Geode (Las Choyas Geode Deposit, near-latest Eocene, ~35 Ma; Chihuahua, Mexico) (31911142874).jpg - Ser Amantio di Nicolao
Faulted geode (Las Choyas Geode Deposit, near-latest Eocene, ~35 Ma; Chihuahua, Mexico) (31911141814).jpg - Ser Amantio di Nicolao
Cracked geode (Las Choyas Geode Deposit, near-latest Eocene, ~35 Ma; Chihuahua, Mexico) (31911142424).jpg - Ser Amantio di Nicolao
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