Gallicite is a chemical element that was known to Human science by the 22nd century. Gallicite was necessary to Earth's war effort during the Earth-Romulan War.
In the year 2156, Columbia was responsible for escorting a convoy carrying gallicite and other necessary war materials. (ENT - The Romulan War novel: Beneath the Raptor's Wing)
External link[]
- Gallicite article at Memory Alpha, the wiki for canon Star Trek.