Jevonite

Jevonite was a rare mineral found on Cardassia.

The Hebitian civilization made impressive arifacts out of jevonite. Many of these valuable objects where later lost when they were plundered by the impoverished Cardassian civilization. In 2369 Gul Madred possessed a Hebitian jevonite handled dagger. (TNG episode: Chain of Command)

In 2376 a jevonite figure was discovered in city of B'hala on Bajor. This find interested Prylar Eivos Calan a great deal as the material had previously believed to have been exclusive to Cardassia. (DS9 novel: Avatar)