lepidomelane

• Minéral appartenant au groupe des micas, plus précisément une variété de biotite riche en fer, se présentant souvent sous forme d'écailles sombres et ferrugineuses.

A mineral belonging to the mica group, specifically a type of biotite that contains iron, often appearing as dark, iron-rich flakes.

1. Iron-rich mica mineralC2formalscientific

   A dark, iron-rich variety of biotite mica, characterized by its black or very dark green color and high iron content.

   Lépidomélane

   • The geologist identified the sample as lepidomelane due to its high iron content.
   • Lepidomelane is often found in granite and pegmatite formations.
   • Under the microscope, lepidomelane shows a distinct dark pleochroism.