French mineralogist A.A. Damour (1808-1902) redefined the term "jade," dividing it into two different categories, one being the softer nephrite found most notably in Hotan, Xinjiang, the other being the harder jadeite, classified by mineralogists as a type of pyroxene.
1863 年，法國礦物學家 A.A.Damour（1808 ~ 1902）重寫「玉」的定義：真正屬於「玉」的礦石只分為兩種，一種是如新疆和闐玉之類的閃石玉，另一種就是屬於輝石類的硬玉「翡翠」。