This article from the Smithsonian is great. It skirts an important topic regarding sea glass, though: seeding.

Should we be throwing glass into the ocean to fuel a hobby? I mostly lean towards allowing it. Why? Glass is fairly inert. There is no toxicity. It also doesn’t float and I don’t think dolphins are going to get their beaks caught in bottles. For that matter, maybe the glass should be broken before being “placed”. What more, glass was originally made of sand – and that is where we find sea glass (ocean beach).

If you saw how the glass ends up, and held a piece in you hands, I think you would agree. It would be sad if, in 50 years, there was no more sea glass to find. We need to get started now.