If natural stone imperfections bother you, pease ask for more pictures.
 
Mookaite is my go to grief stone. It helps a person through the process with a sense of peace. This grounding stone also helps one with change.
 
Sizes vary but they are approximately 2" x 1.5" x .25".
 
Price is per piece.  Available 1, 2, 3, 4, 6, 7, and 8.