See my older question for more information (http://answers.minerals.net/7749/update-previous-question-rinsed-more-colorful-rocks-shown). I'm just taking an educated guess that they are Jasper, would appreciate knowing if they are or not.
For the last three collage images: the left row was taken when the rock was dry. The right column was when the rock was wet. The top row had the flash on and the bottom row had the flash off.
Updated photo - Sept. 20:
After the 5th photo above was put into a tumbler, I noticed some rings inside it.