Talgonite

From Memory Alpha, the free Star Trek reference.

Talgonite is a ceramic alloy that can be used in constructions, including spaceborne installations. It is considered to be far less sophisticated than the metal alloys widely used by humans from the 20th century onwards.

The Kataan probe that was encountered by the USS Enterprise-D in late 2368 was composed of paricium and talgonite. (TNG: "The Inner Light")