People who live in the interior of the country, or on mountains, or in the plains, or have not been near large bodies of water like the great lakes or oceans might not know sea glass refers to tiny bits of glass that have been smoothed by tumbling in sand and water. They have a grainy look with no sharp edges. I don’t know how long it takes, but my romantic concept is many, many years. I’ve collected sea class from Atlantic, Pacific and Lake Michigan beaches. Green seems to be the most common color and then white and brown. It is very rare to find cobalt blue and I have never found red. Now that it is October, there are fewer people on beaches and more off-season storms push debris on shore. The following pictures are of ransom pieces of sea glass on a Chicago beach. It was a good day. If you cannot identify 7 pieces in the first picture, then the second picture has them circled. Click on image to see larger picture