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Streak

The streak is another property that help on the minerals identification, a mineral streak has a specific color and can be known using the mineral as a chalk on a blackboard, except that instead of the blackboard, a ceramic plate is used, obtaining a mark or line (streak) which may be different depending on type of ore used, this mark is composed of the mineral's dust used, and in many cases, the color of this powder differs from the normal color of the mineral, so it is another tool to use in mineral identification.

 
Streak