Pleochroism and color tutorial Optical mineralogy

[@radekkolacny5598]

Since I wasn't able to visit practice lessons this semester, these videos helped me immensely. Thank you very much, kind Sir!

[@SharkRRN81]

You are a life saver

[@mayhtaw9757]

Thank you so much @ Matt. I am the beginner to study petrograph. Your vedioa are so helpful. Wish you can make more!

[@dollydeori7590]

Thank you so much Sir... This really helped me (a covid batch's student)

[@geoffgeoff143]

You often mention poorly made slides. Perhaps a video pointing out faults to look for and causes of them?

[@mattkohn7819]

Oh, good point. That's tricky to pin down (I try not to collect bad sections), but I'll see what I can do.