Mynteer

Mynteer, also known as phenakite, was a hard, clear, and rare gemstone found in the Realms.

Description
These semi-precious stones occurred in crystals, usually with inclusions so that it yielded only small faceted gems. A typical specimen had a base value of 50 gp.

Powers
This stone was powdered and mixed to make magical ink to inscribe scrolls for casting spells related to the movement of objects via levitation, telekinesis, or magical force, such as unseen servant, Tenser's floating disc, etc.