Sea glass?

I’m trying to make sea glass in a rock tumbler but it always has scratches from the HIGH grain grit! Is there any type of super fine grit that can tumble it good. I heard that mixing sand with water and taking the foam that forms on the top called sand dust and using that. Would that work?

  1. GodThingie
    on November 30th, -0001

    Here is a website with information on tumbling sea glass:
    http://www.mamasminerals.com/lmrhftumbli

    Question 12 from this FAQ on rock tumbling:
    http://www.dadsrockshop.com/faq/faq_tumb

    We have a rock tumbler as well. This sounds like an interesting technique. I think I’ll give it a go myself! Thanks for the question!

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Sea glass?

I’m trying to make sea glass in a rock tumbler but it always has scratches from the HIGH grain grit! Is there any type of super fine grit that can tumble it good. I heard that mixing sand with water and taking the foam that forms on the top called sand dust and using that. Would that work?

  1. CheeseCake
    on November 30th, -0001

    You need to run it through several cycles, starting with course grit like #80 Silicon Carbide grit, then finer and finer grit until finishing with a fine polish like Cerium Oxide or Tin Oxide. A vibratory tumbler will polish glass better than a rotary tumbler, and adding plastic pellets, ground walnut shells, dish soap, sugar, Karo syrup, or something similar to slow down the impacts will help on softer materials like glass. The idea is to make finer and finer scratches in the material you’re working to cover the bigger scratches until they are all too small to see. A few peices of larger grit will still make scratches, so be sure you clean everything between each step or you’ll get course grit in the finer steps and still have the deeper scratches.

    You can order all the different grits and polishes from a number of places online, just search for “lapidary supplies”. Most of these sites have a how-to section, sea glass can be worked exactly as the instuctions for obsidian.

  2. CrispApple
    on November 30th, -0001

    lots of salt

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