This is a reaction I never would have thought to test for. The glasses involved are CiM's beautiful peacock green and Effetre dark periwinkle. The bead worked normally and went into the annealer just off red hot. As the annealing cycle wore on, I began hearing the dread clink at around 600 degrees F. I allowed the beads to cool, then removed them to discover this. I did make a solid peacock green bead this size that did fine, so I can only assume that there is a slight incompatibility between the green and the periwinkle. Check out the neat separation thing going on on the surface of the periwinkle.
Kind of bizarre the way the periwinkle sort of formed a clear bubble around itself that is reflecting itself onto the peacock green. It seems to be sinkin in too.
Tiny hairline cracks formed all around where the periwinkle was applied.
The cracks around the periwinkle really show up well in this picture, even though it's out of focus. I couldn't get the camera to focus properly in this shot, but it shows the ruin better than any of the others. What a bummer. I would have liked this color combination. I did something similar with Effetre nile green opalino that is holding up so far, so that will have to be the green and violet blue I was looking for in this piece. Anyone have a similar experience?