pleonaste

• Minéral sombre du groupe du spinelle, contenant du fer, souvent utilisé en gemmologie et en minéralogie.

A dark-colored mineral of the spinel group that contains iron, often used in gemology and mineralogy.

1. Dark spinel mineralC2formalscientific

   A dark-colored variety of spinel, typically containing iron, used as a gemstone or in mineral collections.

   Pléonaste (spinelle sombre)

   • The geologist identified the specimen as pleonaste due to its deep black color.
   • Pleonaste is often found in metamorphic rocks alongside other spinels.
   • Collectors value pleonaste for its unique dark hue and crystalline structure.

   Synonymesceylonite