What is black when you buy it, red when you see it, and gray when you throw it a away?

Answer

When you buy coal it is black. When you burn coal it turns red. When you throw coal away after use it is gray. Coal has many uses but the all time favorite is to grill with it.
1 Additional Answer
Many back yard barbecues have taught me that both charcoal and regular coal is black when you buy it. It turns red when you use it and turns gray when you throw it away.
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Explore this Topic
Actually, Coal is black when you buy it, red when you use it and see it, and grey ashes when you throw it away after you are done. The coal is red when it's on ...
The answer to the riddle - what is black when you buy it, red when you use it, and gray when you throw it away - is coal. It is black when you first buy it, red ...
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