I knew from all the buzz about The Final Revival of Opal & Nev that it's a work of fiction by first-time novelist Dawnie Walton. But after I started her book, I had to stop and double check to make ...

Colorado scientists who were curious about why Castle Rock remains largely resistant to erosion have published a research paper that provides some answers. They have determined that opal is partially ...

Researchers at the Denver Museum of Nature and Science found that Castle Rock’s durability is due to microscopic amounts of the colorful gemstone, opal. Colorado Voices is available to stream on ...