Ok, it bugs the hell out of me that the first reports called it a monolith, which is a term used for something made from a single huge stone... It means "One stone." It's NOT stone, but metal. It's a beam, or an ingot.
They obviously called it that to make a connection to the actual stone monolith used in 2001 Space Odyssey. It helped the conspiracy or added to the mythology, sparking imaginations. But, it is NOT a monolith. Words matter, do they not? But, now every yahoo on the internet is calling all of these "monoliths." It's giving me a headache.