Jade is the term for two different semiprecious minerals: nephrite and jadeite. Jade is usually light green, but it can also be white or yellow. It has been a sought-after material in Asian art since Neolithic times. It was also greatly valued for jewelry in Pre-Columbian Mesoamerica and in the Maori culture of New Zealand. Web resources here and here. Video here.

Jade mask, earspools and necklaces from the tomb of Pakal the Great, Palenque, Mexico. Classic Maya. Ca. 683 CE. Museo Nacional de Antropologia, Mexico City.