Answer to the Red Black and White Riddle

Answer to the Puzzle of the Day 2203 : Red Black and White Riddle
Here is the refresher to the puzzle

Riddle :

I am black when bought, red when you use me,
when I turn white you know it’s time to throw me away.

What am I?

Now the Answer : 

Answer : Coal
Explanation : Coal is black in its natural form when you buy it. When you burn it, it becomes red. When completely burnt out, the ashes are white-ish in color. It is when you throw it away.

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