Virtual microscope cleavage slidecast 

Next time, use the mouse the point at the things you are referring to in the video. As a beginner, it is quite difficult.

Excellent

I wish you did more like it

OK I can hear the radio in the background which is weird, I couldn't hear it when I was recording...

Nice video Simon, I have measured the 60 degree angles on amphiboles plenty of times, but how do they get the 120 angle? This has confused me for a long time I hope you can clear it up. Amphiboles at 60 and 120

I watched this entire video and I saw no cleavage

It is more polished than mine - asktherockdoc on RU-vid.