This is a group of fluorite from the past couple of weeks. They are really mesmerizing to view up close. Each one appears to be filled with a colorful gas or liquid. Some have layers of color, while other maintain a consistent color. One is perfectly water-clear. I mistook it for quartz until I realized it was a cube. Not that all fluorites are cubes, some are octahedral like the bright blue cluster in the upper right corner.