A cross-section of agate. Chalcedony lamination highlighted with a purple pigment. Multicolored silica bands colored with metal oxides are visible. Origin: Agouin, Atlas mountains, Morocco.

A cross-section of agate. Chalcedony lamination highlighted with a purple pigment. Multicolored silica bands colored with metal oxides are visible. Origin: Agouin, Atlas mountains, Morocco. - 120121446

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