I find lots of old bottles scuba diving in a local harbor. They used to anchor schooners here is the 1800's so I get lots of bottles from that time period. They always have a little coral growing on them and have a little sand blasted look to the glass. Not like good sea glass, but just a little worn. Are these bottles worth anything? Here's a pic of three. These are typical of my finds. I probably have 50 similar bottles, but some are not in as good shape.