Chrondite is a mineral that is present in significant quantities in some asteroids. It is 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")

Minerals

Anorthosite • Antimonium • Bakrinium • Benamite • Beresium • Bernicium • Bilitrium • Boronite • Chrondite • Cormaline • Feldomite • Feldspar • Fortanium • Gallicite • Jakmanite • Jevonite • Kelbonite • Kemocite • Ladarium • Magnesite • Murinite • Neutronium • Nitrium • Noranium • Paralithium • Pergium • Regolith • Riddinite • Ryetalyn • Silithium • Styrolite • Talgonite • Topaline • Trellium • Tricyanate • Trimagnesite • Tritanium • Uridium • Vendarite • Zenite