Ice cube beads

Here's my first round of ice cube beads. Why do I call them ice cubes? They're clear and rectangular. The top row has an opaque lime (I don't know the real names yet) core with an aqua transparent encasement. The next set is periwinkle opaque with a purple transparent encasement. Not my favorite; I think the glass got too hot. I have a third one that's still stuck on the mandrel and it's not any better.

Bottom left is my first attempt at a Christmas bead. LOL.