Nephrite such as Lantian, Shaanxi, were also in great demand). There, white and greenish nephrite jade is found in small quarries and as pebbles and boulders in the rivers flowing from the Kuen-Lun mountain range northward into the Takla-Makan desert area. River jade collection was concentrated in the Yarkand, and the White Jade (Yurungkash) and Black Jade (Karakash) Rivers in Khotan. From the Kingdom of Khotan, on the southern leg of the Silk Road, yearly tribute payments consisting of the most precious white jade were made to the Chinese imperial court and there transformed into "objets d'art" by skilled artisans, as
Ornamental animal captivity and have formed feral populations. A number of animals have been protected from local or worldwide extinction by being kept as ornamental animals. The following are breeds or species whose history has included a significant period as ornamental animals, either globally or in particular regions (animals kept primarily in modern zoos, aquaria or waterfowl collections are not included): Ornamental animal An ornamental animal is an animal kept for display or curiosity, often in a park. A wide range of mammals, birds and fish have been kept as ornamental animals. Ornamental animals have often formed the basis of introduced populations,