It has a brittle to conchoidal fracture and indistinct cleavage. Cubic zirconia has no cleavage and exhibits a conchoidal fracture. It has an imperfect octahedral cleavage and a conchoidal fracture. It exhibits distinct cleavage and has a brittle to conchoidal fracture. It has a vitreous luster and a conchoidal to uneven fracture. The mineral is brittle, with a conchoidal or uneven fracture. Pezzottiate is brittle with a conchoidal to irregular fracture, and streaks white. The mineral is brittle, with an uneven to conchoidal fracture. It has a brittle to conchoidal fracture. It has no cleavage and is brittle to conchoidal fracture. It has very poor cleavage and a brittle to conchoidal fracture. Vanadinite is very brittle, producing small, conchoidal fragments when fractured. Subconchoidal fracture is similar to conchoidal fracture, but with less significant curvature. It has indistinct cleavage on {001} and a conchoidal fracture and is brittle. It has one direction of perfect cleavage and exhibits conchoidal fracture.