TIL that the name "jade" comes from a Spanish phrase meaning "stone of the kidney" — and the Chinese name has an equally fascinating origin story!

The term "Hetian jade" (和田玉) actually comes from the ancient city of Khotan (于阗, Yutian), a key oasis on the Silk Road that thrived for over 3,000 years as a jade trading hub. Merchants from Persia, Rome, India, and China all sought jade here, with Chinese emperors even sending envoys during the Han Dynasty to acquire this prized stone.

The name Khotan was replaced by "Hetian" (meaning "harmonious fields") during the Qing Dynasty, giving us the modern name for this nephrite jade variety. Two famous rivers—the White Jade River (Yurungkash) and the Black Jade River (Karakash)—have long produced a stunning spectrum of nephrite colors from milky white and celadon to rich greens, black, warm yellows, and russet browns.

Western scientists call this stone "nephrite," from the Greek word for kidney, reflecting old beliefs that jade could heal kidney ailments. So the same stone carries a cultural name (Hetian jade), a scientific name (nephrite), and a popular English name (jade).

What’s your favorite nephrite color, and did you know about the ancient jade trade routes before?