Lapis lazuli is the birthstone of December babies, and it's one of the few crystals that's an actual rock, not a mineral, composed of lazurite with other elements mixed in. It's usually a deep blue or ...
A typical geode specimen found in the Keokuk area. This one exhibits the peculiarity of multiple chambers, actually being ...
While Colorado is known for its hiking no matter the season, fall offers new sights and dazzling displays that can only be found once a year. While “rushing for gold” can be fun, it can also be ...