Quartz is the dominant mineral found in Keokuk geodes, though fully 17 minerals have been identified and a great variety of crystal formation types also are used to differentiate between what lies ...

A short note on the concept, formation and structure of Geodes which is very useful for the competitive examinations like UPSC-prelims, SSC, State Services, NDA, CDS, and Railways etc.

Researchers from the University of Göttingen in front of a giant amethyst geode in Uruguay. Geodes like this were discovered in cooled lava flows dating back to the original breakup of the Gondwana ...

The Giant Geode of Pulpí is located inside the Mina Rica, located on the eastern slope of the Sierra del Aguilón, in the villaje of Pilar de Jaravía, in the municipality of Pulpí (Almería, Spain). The ...

How to Watch But Why – A show for curious kids But Why – A show for curious kids is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android ...

Mystery of Uruguay’s amethyst geodes International research team led by Göttingen University identifies new model to explain amethyst formation Peer-Reviewed Publication University of Göttingen ...

Ces scientifiques tentent de percer les mystères derrière la formation des géodes d'améthyste, présentes dans d'anciens flux de lave. Géode d'améthyste et de calcite du district de Los Catalanes, ...