Manganese

Manganese was an elemental material found in the Realms.

Description
Manganese appeared as a metallic black substance, similar to hematite.

Availability
Dissolved manganese in seawater precipitated into nodes of metal on the ocean floor, among other metals. Some gems included manganese:
 * Crown of silver gems contained strong black bands of manganese.
 * Spinels were made up of crystalline manganese oxide and aluminum.
 * Moss agates had gray-green inclusions of manganese that resembled moss.

The Elemental Store of Karsus Enclave sold pure elemental powdered manganese for 6 gp per.

Anastur's Abrasives had prospectors that searched the Delimbiyr Vale for deposits of manganese and other minerals.

Usages
Manganese had some use in various metal alloys.

Metal-polishing abrasives used a mixture of substances, including manganese, iron oxide, and other minerals and oils.