sardonyx

• Variedade de ágata em que faixas paralelas de sardônio (calcedônia marrom-avermelhada) alternam com faixas de outra calcedônia, geralmente branca ou preta. É uma pedra preciosa usada em joalheria e entalhes.

A gemstone variety of onyx featuring alternating parallel bands of sard (a reddish-brown chalcedony) and another mineral, typically white or black chalcedony.

1. A type of gemstoneC1formal

   A gemstone variety of onyx that features alternating parallel bands of sard (a reddish-brown chalcedony) and another mineral, often white or black.

   Sardônica

   • The ancient ring was set with a beautifully carved sardonyx.
   • Sardonyx is often used in cameos due to its layered structure.
   • Collectors prize sardonyx for its distinctive striped appearance.