Streak: None of the minerals in the Y diagram have a definitely colored streak.

Luster: Quartz and Olivine have a truly glassy luster
            Muscovite and Biotite luster is like patent leather
            Remaining minerals on the Y have a bright luster

Hardness: Biotite and Muscovite are harder than a fingernail but softer than glass
                 Remaining minerals on the Y are harder than glass

Breakage: Quartz and Olivine break with a conchodial fracture
                Muscovite and Biotite cleave in one direction
                Hornblende cleaves in two directions that do not meet at 90°
                Remaining minerals on the Y cleave in two directions that meet at 90°

Special Properties: Anorthite and Albite have twinning striations
                              Olivine almost always has a granular habit