These cabs are made up with  grains of sand or other sediment rolling around on an ancient sea floor gradually picking up layers of deposits that show up as spherical cross-sections, called oolites, and that's how this fascinating stone was formed.  Some of these were found in the area where Bristlecone pine trees have grown on ancient sea beds. As I cab others I have I will identify them as best I can. The area for Bristlecone is closed for collecting.