Tiger eye agate

Tiger eye agate, also known as tiger's eye, was a member of the agate family.

Description
This agate was a golden hue with dark brown stripes  that exhibited a silky luster called chatoyancy. This ornamental stone was named for its color and its stripes. A typical stone had a base value of 10 gp.

Powers
Legends about this mineral said that it repelled undead and restless spirits, but had never been proven to be true. Regardless of this lack of evidence, the legend generated demand for tiger eye to be powdered and used in inks to mark caskets, sarcophagi, and tombs to prevent the dead from rising, and as an ingredient in potions of undead control.