Assertion: cobalt | /r/HasProperty | detected in glass
Facets:
value: in china
type: LOCATION
Source sentences:
text: Cobalt has been detected in Egyptian statuettes and Persian necklace beads of the 3rd millennium bce, in glass found in the Pompeii ruins, and in China as early as the Tang dynasty (618–907 ce) and later in the blue porcelain of the Ming dynasty (1368–1644).