I have beads from months ago and they are all fine.The only cracking issues I have had are from letting a bead cool too much while torching it.
Personally I love this line of glass because it melts so nicely on my HH.The only issue I had with it turned out to be a nice surprise instead.I rolled my seashells made of rose quartz in silver foil and was upset to see what I thought was scum.I put one in Etchall and the "scum"came off leaving me a pretty bead
BEFORE
AFTER
Some of the before ones had an almost fumed look to them.After etching I think the rose quartz ones look like an antique treasure from the sea
Tina