Sea glass started out as bottles, jars, vases, sculptures, stained glass, glasses, knickknacks, toys, and other glass items that were thrown away and eventually ended up on the shore. The pieces tumbled in the waves for decades or even centuries and were shaped into the frosted glass found on beaches around the world, near oceans, seas, lakes, and rivers. Just like the original pieces of glass that were thrown in the waves long ago, sea glass comes in every color of the rainbow.