Mineral Streak is an Important Test to Identify Samples

Geologists use many tests to determine the identity of a mineral. Streak can be one of the most important tests when trying to tell two similar minerals apart. A mineral’s streak is its color when the mineral in is powdered form.

How to Perform a Mineral Streak Test

A streak test is one tool that geologists use to determine the identity of a mineral. The “streak” is the color of the mineral in powdered form. Some minerals will have a streak color that is the same as the outer color of the mineral while others will have a streak color that is very different from the outer color.