A person? - No.
A place? - No.
A substance? - No.
An item? - Yes.
Did it exist in the First Age? - This is up to conjecture, but most likely yes.
A weapon? - No.
Is it an Elven Craft? - No.
Was it made/manufactured? - Difficult. Not exactly made, I'd say, but it was most probably shaped or worked to some degree.
A dwarf treasure? - Not a treasure...
Alright then, does it belong to the dwarves? - Yes, I think you could say that.
Is it valuable? - It is dear to them, but not in the same way as gold and jewels.
Now what about a question I can answer with Yes or No without pondering?