MKohn Mineralogy Videos
I have created several (19 so far…) videos on optical mineralogy and uploaded them to YouTube. These are pretty bare bones – just the image that you see down a microscope in plane and crossed polarized light, rotating the stage to illustrate characteristic optical features.
Here are the YouTube links (if the links don’t work, go to YouTube and search on “OpticalMineral”):
Links
- Birds’-eye extinction in micas
- Sillimanite
- Andalusite (chiastolite)
- Andalusite pleochroism
- Calcite, X-polars
- Calcite, variable relief
- Cpx, inclined extinction
- Hbl, plag, X-polars
- Chloritoid, rutile in garnet
- Kyanite and muscovite
- Anthophyllite, parallel extinction
- Pleochroic haloes in biotite, plane-polarized
- Pleochroic halo in biotite, plane- and X-polars
- Opx, parallel extinction
- Opx, pleochroism
- Cordierite, pleochroic haloes
- Glaucophane 1, pleochroism
- Glaucophane 2, pleochroism
- Glaucophane 3, pleochroism