Two different kinds of glass. Quartz is higher in SiO2 than borosilicate and will withstand higher heat.I am a bit confused about quartz. That banger pic I posted is "quartz" allegedly but it looks like glass. It seems to get the job done. Not sure what this markets definition of quartz in this glassware is
Pardy, pardy, pardy!!!!!!!!!!!!!!!!!!!!!!!!!Are we having a solar eclipse party next week?
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