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Old 2019-06-09, 10:10am
Robin Passovoy Robin Passovoy is offline
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Join Date: Dec 31, 2009
Posts: 504
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You can't do soft glass marbles without annealing them properly, trust me, but I have had some luck with small marbles made from strips cut from Spectrum stained glass, which is roughly 96 CoE and a bit more forgiving of fast cooling in vermiculite.
You might want to invest in an actual annealing kiln, such as a Jen-Ken Chili Pepper. I've got one and I love it--they're durable, dependable, programmable, and it can handle my biggest marbles (~2") without them coming out in pieces. Chili Peppers aren't the cheapest out there, but they're worth every penny.
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