Ever wonder why Castle Rock never erodes?

By Murphy Huston on February 6, 2024

Castle Rock landmark in Colorado. (Photo by: John Greim/Loop Images/Universal Images Group via Getty Images)

You have seen Castle Rock before, I don’t mean the city I mean Castle Rock that sits above the city. It has been that way for years and never erodes. The Denver Museum of Nature & Science did a study about that very fact. Castle Rocks durability can be attributed to the presence of….OPAL. It’s a gem mineral that holds it together. this makes Castle Rock harder than cement.