Pietra nefritica

Esquema

Getty AAT: Materials (matter)

Jerarquía

<materials by composition> > inorganic material > rock > metamorphic rock > serpentinite

Descripción

An extremely heavy sepentinite having the form of a flattened sphere, its name deriving from the Greek word for kidney. The rocks were used by the ancient Romans as standard weights and were also supposedly tied around the necks of condemned Christians before they were drowned, explaining why it is sometimes referred to as martyr's stone. It is most commonly jet black with small specks of gray and a metallic texture.

URI original del concepto

http://vocab.getty.edu/aat/300011632

Otros términos

  • nefrietsteen [nl]
  • piedra nefrítica [es]
  • lapis aequipondus [en]
  • martyr's stone [en]
  • piedrezuela [es]