No it is not.
Coal is not malleable in the traditional sense, as it is a brittle and hard material. Malleability refers to the ability of a material to be deformed under compressive stress, which coal does not exhibit. Coal is primarily composed of carbon and other elements, and its structure is not conducive to being shaped or molded like malleable materials such as metals.
Coal is neither malleable nor ductile. It is brittle. It would crumble if you tried to draw it into a wire.
Your subordinate's malleability is in question.
Malleable, brittle, ductile
A coal looks like this, a piece of rock that is black to brown.
Ember
The average weight of one piece of coal can vary depending on its size and type, but it typically ranges from around 0.5 to 2 pounds.
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In Spain, bad children receive a piece of coal made out of sugar for Christmas.