▲ Bourse minéraux et fossiles de Sainte Marie aux Mines (Alsace) - 24>28 juin 2026 ▲

Principaux sujets de Géoforum.

Bourse minéraux Sainte Marie aux Mines 2026, avec fossiles et gemmes.

Brèche basaltique à fragments de socle (Mt. Briançon - Hte.

Agrégat de fragments de lave basaltique bulleuse, nombreux éléments vitreux et enclaves d’origine profonde. (7 cm env.)

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