You are the Christ, the Son of the living God." Jesus replied, "Blessed are you, Simon son of Jonah, for this was not revealed to you by man, but by my Father in heaven. And I tell you that you are Peter, and on this rock I will build my church, and the gates of Hades will not overcome it.
I'm stating the obvious by remarking that this passage gets everybody worked up about interpretations. It's specifically about the interpretation of the name Peter, which is a key detail.
Losing keys - people hate it when that happens. Another of life's little annoyances, like when loose is supposed to be lose.
No; it's not.
Call Peter pebble, sand, rock, cobble, stone, boulder or mountain - it STILL will not place him as the head of any supposed church that Jesus started.