Review Minerals-2

One test for identifying minerals involves rubbing the mineral on a rough tile, and looking at the color of the mark it leaves. This test is called:

  1. Cleavage

    No. Cleavage is when a mineral breaks along planes of weakness to form flat surfaces.
  2. Hardness

    No. Hardness is the resistance of a mineral to being scratched by other substances.
  3. Fracture

    No. Fracture is when a mineral breaks but does not show cleavage.
  4. Streak

    Yes. The streak test examines the color of the mineral when it is powdered by rubbing it on a rough tile or streak plate. While the actual color of a mineral can vary, it will always produce the same color streak.

Click to see which state standards this question tests, and which of my videos, experiments, and other resources support that topic.


SC.4.E.6.2 Identify the physical properties of common earth-forming minerals, including hardness, color, luster, cleavage, and streak color, and recognize the role of minerals in the formation of rocks.


UT.8.III.1.b Observe and describe the minerals found in rocks (e.g., shape, color, luster, texture, hardness).