obsidian

• Nom désignant une roche volcanique naturelle sombre, formée par le refroidissement rapide de la lave, historiquement souvent utilisée pour fabriquer des outils et des objets décoratifs.

A noun referring to a dark, natural volcanic glass formed from rapidly cooled lava, often used historically for tools and decorative objects.

indénombrable

1. Volcanic glassC1formal

   A dark, natural glass formed when lava cools rapidly without crystallizing, often used in tools and ornaments.

   Obsidienne (verre volcanique)

   • Obsidian was used by ancient cultures to make sharp arrowheads.
   • The volcanic rock obsidian has a smooth, glassy texture.
   • Collectors prize obsidian for its deep black color and conchoidal fracture.

   Synonymesvolcanic glass