Red colored agate is considered to be a precious variety. Snuff Bottle Chinese Qing dynasty, 18th century Crystal with pink jasper and gold cover on wood stand University Art Gallery 1988. It is surrounded by a snake, frog, scorpion, centipede, and chameleon. On the other side of the bottle, surrounding a six-pointed star, are a conch shell, a reed, a peony, a cherry blossom, and two herbs. Crystal was often made into artifacts in ancient China.
Purple crystal is more precious than clear crystal.
Turquoise on rosewood stands University Art Gallery 1991. The natural black line on the material is called iron line. This adds to the beauty of the pair of horses. Turquoise was much favored by the Qing elite, although it was first used 5000 to 6000 years ago in China. Hubei and Shaanxi are famous sources of turquoise.