EVERYDAY SCIENCE

Detailed explanation-1: -The color of a mineral in powdered form is called the mineral’s streak. To find a mineral’s streak, the mineral is rubbed against a piece of unglazed porcelain called a streak plate. The mark left on the streak plate is the streak.

Detailed explanation-2: -Answer and Explanation: The color of a mineral’s powder is called its ‘streak. ‘ This term comes from the ‘streak test, ’ which is the method by which a mineral’s powder is examined. A sample of the mineral is swiped across a ‘streak plate’ so that the powder left behind can be examined.

Detailed explanation-3: -Some minerals leave a streak similar to their natural color, such as cinnabar, lazurite and native gold. Other minerals leave surprising colors, such as fluorite, which always has a white streak, although it can appear in purple, blue, yellow, or green crystals.

Detailed explanation-4: -Streak is simply the color of a mineral powder. Many minerals have a different color when powdered than they do in crystal or massive forms. The color may be entirely different, or it may be a different shade. Quite a few minerals give a powder streak that is lighter in color than the whole crystal or massive pieces.

Detailed explanation-5: -For example, azurite has a blue outward color, and a blue streak, and limonite is a yellow-brown color both outside and in powder form. Conversely, yellow sulfur has a white streak while gray hematite has a cherry red streak color.