Optical properties of biaxial minerals

[@AdrianDotis]

...closes mineralogy text and turns up volume. Great stuff sir!!!

[@violaschmid477]

That's the sound of my future minerology midterm mark going up by 15-20%!!!

[@lualchris6856]

Thanks a million, I’m forever in your debt...I was not understanding this part but now I’m perfect

[@krakmynutz]

sweet mother mary there is audio! I'M SAVED!!!!!!

[@jbar3762]

what does he say at 4:30-4:35? I thought you couldn't tell if it was - or + when 2V was close to 90.

[@nitinnandan4145]

Same doubt!!??

[@keithlarsen7557]

Schist! I guessed biotite!