Jade

Jade was the generally accepted name for a class of stones found in the Realms that included jadeite and nephrite.

Description
When jade was freshly mined, it was found in shades of light to dark green, and white. As it aged, jade turned a warm brown hue. If buried for long periods of time, jade turned a dark red or brown and was known as tomb jade. Jade had a waxy appearance when polished and was easily carved. This stone was completely opaque unless carved thin enough for light to filter through, giving it a warm glow. A typical specimen had a base value of 100 gp. The highest quality jade was known as mei-yu jade, or high jade; lesser quality jade was yu jade.

Powers
Powdered jade had an affinity for illusion/phantasm spells and was the ingredient of choice when mixing magic inks to scribe such spell scrolls. It was also necessary in immersions for items intended to create illusions. The best time of day for mixing jade dust into a magical preparation was candleglass time.

Jade was used as the material component for the hail of stone spell   and by Kara-Turan versions of the shape change spell.

Reputation
Bards and other musicians in the Realms wore jade for luck as it was said to improve musical talent. The stones were also favored by the gods Baravar Cloakshadow, Erevan Ilesere, and Urogalan.

Jade was a common stone among the drow, a gem worn by drow of average station. It was under common use as an inlay-stone or decoration.

In Kara-Tur, jade was believed to block the passage of all manner of ghosts.

History
The craftsmen of Shou Lung were skilled in the working of jade of all kinds, and the finest quality jade on Toril was mined in that land.

The gem dragon sorceress Nyadnar had a house with display cases, stands, and pedestals to showcase her wide collection of gemstones, and many of these displays were themselves made of polished jadeite and nephrite.