Just so you know, absolutely none of that is true.
https://en.wikipedia.org/wiki/Pyramidion_of_Amenemhat_III
I don't know if the person who posted that is sincere or not, but plenty of people sincerely believe this sort of thing when it is posted on Facebook.
There's something to it in that the archaeologists who discovered it named that sort of thing a Benben stone after the mound of creation they are supposed to symbolize. I'd put that at more like 99% wrong but I'm willing to concede that they got the word Benben from something related to whatever the fuck they were trying to say.
In all fairness, I wasn't there when the archaeologists named it, and I have no idea why they named it that, but yeah it's called a Benben stone, they've been called that for a long time. Yeah it sounds silly, but that's probably the only correct word in their post. ๐คทโโ๏ธ
Yeah, but like I said to someone else, not really... it's like calling the Cleopatra's Needle "the Egyptian obelisk." I mean, yeah, it's an obelisk. But it's not THE obelisk.