My husband Kip and I have enjoyed rock hunting and also collecting shells over the years.  We found these odd granite-like rocks at Black’s Beach in La Jolla in the 1970s.  Not sure if they are even found there anymore … have you seen these before?  They were naturally tumbled by the surf and rough shoreline into this very round shape.  There are some funny ones that are not quite formed yet, egg shaped or formed in doubles and triples.