Question

which mineral property is defined as \powder that the mineral makes when it is scraped on a small piece of unglazed porcelain\?
streak
hardness
color
cleavage

Explanation:

The streak of a mineral is the color of the powder it leaves behind when scraped on a small piece of unglazed porcelain (a streak - plate). Hardness refers to a mineral's resistance to scratching. Color is the visible hue of the mineral. Cleavage is the tendency of a mineral to break along smooth, flat surfaces.

Answer:

streak