Chrondite was a mineral present in significant quantities in some asteroids. It was a dense, durable metal, especially when combined with nitrium.

In 2368, an asteroid with a core of chrondite and nitrium threatened the planet Tessen III. The strong, dense core rendered the asteroid partially invulnerable to photon torpedoes, so it could only be destroyed by a concentrated particle beam. (TNG: "Cost of Living")

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