u/Due-Philosopher-3850

I found this rock next to a river in the Olympic Mountains (Washington). It appears to be a fossilized bone. I thought it was very cool that the ends formed a different type of stone than the rest. Had a fun time with TSA on my flight back as they searched through my entire suitcase trying to find the “unidentified bone-shaped object” at the bottom of my bag 😂 Any idea what type of bone and/or stone it is?