Cormaline was a relatively common (and valuable) mineral which was found on many planets across the galaxy. Worlds with rich cormaline deposits included Kabrel II, Koltaari, Ocampa, and Torga IV.
In the 2310s, the abundant cormaline deposits on Koltaari made them a target of the Romulan Star Empire. (TLE novel: Serpents Among the Ruins)
In the Delta Quadrant, the Kazon-Ogla operated a cormaline mining camp on Ocampa, and would often trade the substance with neighboring Kazon sects. (VOY episode & novelization: Caretaker)
In 2373, Starfleet dispatched a team from Deep Space 9 to enter the Gamma Quadrant and investigate Torga IV in the hopes of mining the planets rich cormaline deposits. (DS9 episode: "The Ship")
Large scale mining operations would soon be established on Torga IV to extract the cormaline. (TNG novel: The Genesis Wave, Book 3)