"For fun though give us details about these "stones". Were they hard? Soft? Float? Sink? Color? Clear or opaque? What did the larger "stones" in particular look like?"
Some were harder than others. Some squished easily, others not as easily. Some sank, most floated. Colors varied from yellowish/green to brighter green/darker green to reddish and even a bit darker. Pretty much all of the above. No two stones were completely the same. Varied in size from marble sized to the size of a small unhulled sunflower seed. The larger ones were a bit darker overall, although some of them were the brighter green that I mentioned.