The dark red on blue base (third photo) I suspect is an Alley, fourth photo is a Peltier Rainbo, and the last three look like Vitro All Reds. The others are intriguing but more views of each are needed.
Interesting discussion. I imagine every collector has wanted to see a magnified view at some point. It's not necessarily about finding flaws but more about admiring these small objects in a more immersive way. It's pretty enjoyable sitting in a sunny window looking at marbles with a loupe.