Agate is a common semiprecious mineral that has long been used as a gem. Most agates occur in cavities of eruptive rocks or ancient lavas.

According to ancient superstition, wearing agate made one agreeable, persuasive, prudent yet bold. It brought God's favor and bestowed the power to vanquish enemies and acquire riches. White agate supposedly cured insomnia.

Fire agate also has been used and is currently used in Indian style jewelry.