I'm not a geologist, but I still find this little hidden treasure remarkable!
Plain old Pennsylvania limestone with a little hidden treasure inside.
On a photo shoot with a friend we tried to capture her three horses together without
one of them eating grass. Horses are hard to get to cooperate!
Besides that they still make a great picture!
--There's always one that stands alone.
While this horse was posing quite nicely for the camera the other two
decided to photo bomb!