Northstar user manual: "NS-75 Indigo Aventurine: A deep blue aventurine color. Work in an oxidizing flame."
If you didn't work in an explicitly oxidizing flame, I'm thinking that's your problem right there, as the guys have already noted above. Sparkles were my nemesis when I was on concentrators. I've since changed my mind about them but yeah, they're reduction sensitive.
Long garage segments at annealing temperature can cause issues as well.
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Chris Scala
Fortune Cookie say, "When things go wrong, don't go with them!"
Current Glass-Melting Apparatus:
GTT Lynx powered by 2 5 LPM Oxycons and
a sexy Barracuda running pure tanked Oxy
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