We might think that Metal only grieves for a death, but there are many other kinds of losses it can feel. Its grief can indeed stem from the actual loss of a person, but it can also grieve for what can be as acute, or even more acute, than a loss, which is an absence, a person who is not there for them, either physically or emotionally, such as an emotionally distant parent.
It can also mourn all that it will never have and all that was never there. It can grieve for the things it has never done and will now never do, for what it has never known and for what it will now never know, for the losses it will never make up and the joys it will now never experience.
These are some of the losses which Metal, of all the elements, can experience the most profoundly.