2.Luster: the way light bounces off a mineral's surface.
3.Streak: the color of the powder left when a mineral is rubbed against a hard, rough surface.
4.Hardness: how well a mineral resist scratching.
5.Cleavage: the tendency of a mineral to break along flat surfaces.
6.Ore: a mineral containing a useful substance.
7.Gem: a mineral valued for being rare and beautiful.
8.Nonrenewable resource: a resource that cannot be replaced within a short period of time or at all.