Jade was prized for its hardness , durability , musical qualities , and beauty .
Native sources in Henan and along the Yangtze were exploited since prehistoric times and have largely been exhausted ; most Chinese jade today is extracted from the northwestern province of Xinjiang .
Jade was prized for Chinese 's hardness , durability , musical qualities , and beauty .
Native sources in Henan and along the Yangtze were exploited since prehistoric times and have largely been exhausted ; most Chinese jade today is extracted from the northwestern province of Xinjiang .