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Making sea glass by tumbling it in a cement mixer. I am such a hick. Well it will never be a true sea glass because that is a chemical process we are unwilling to replicate but it makes a nice bulk substitute.
NOTE:
We have now filled all of our flower beds with it and other than being a pain to pick the cut grass and blown in leaves it has been great. The poor old mixer has taken a beating but is still going strong after new bearings.
Some hints:
Tumble wet, bout a gallon of H2O works well.
Add a few smaller rocks to greatly speed the process, too big and they will pulverize the load, too small and they are hard to pick out. Think match box car size.
Figure on 6-8 hours if you want a smoother sea glass look.
It is LOUD, wrap the drum in an old blanket and tumble in your garage if you don't want to irritate the neighbors.
You can toss in whole bottles and jars and they will break down but you will have to stop the mixer and add more again and again until it is full. We pre-break but are not overly anal about it. 3 1/2 5 gallon pails of glass is about right for my mixer.
Bottles work but other than the bases the chunks get REAL small. Antique broken glass from old dump sites works well as does broken window glass 1/4 and thicker.
The glass repair place more or less gave us whatever we wanted from their cast off and replacements, try them first.
Some glass tumbles with a greenish tint, you can see it when broken. I don't like the finished look and tried to avoid it.
