You can get an idea on some of them from the Double Helix website, looking at past test batches. If you are on FB, there is a thread there, group name is Lampwork Beadmaking Tips, Techniques and Questions, with people talking about their garage sale boxes, and samples of some of the tests they have done with the glass.
For some reason I can't get into their website (doublehelixglassworks.com I think) to show you exactly where it is, sorry.
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My current "hot" fantasy involves a senior discount on glass & tools!
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