Optical properties of minerals - Optical Mineralogy

Optical properties of minerals - Optical Mineralogy - Part 1: Basics of transmitted light microscopy and observations in Plane Polarized Light(PPL).

This 2 part video goes into the optical properties of minerals observed via transmitted light microscopy with the petrographic microscope.

Don't worry, there's no wait time for the second part, and you don't need to search to find it - as it's at the end of this video, click the end screen and you continue like normal, I just split it for pacing reasons.

This video explains properties required for mineralogy and geology courses in university, and will hopefully help you understand mineralogy and geology better.

part 1 explains:
parts of the petrographic microscope
opacity
grain shape
relief and the becke line test
absorption colour and pleochroism
cleavage

part 2 explains:
interference colours, birefringence, and the michel-levy chart
extinction types
extinction angles
sign of elongation
optic sign
biaxial indicatrices and biaxial interference figures
uniaxial indicatrices and uniaxial interference figures
twinning
zoning
exsolution

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00:00 The Petrographic Microscope and transmitted light microscopy
01:19 How Polarizers Work
03:11 Thin Sections and grain mounts
03:31 Properties in PPL - Opacity
04:13 Properties in PPL - Grain/Crystal Shape
04:48 Properties in PPL - Refractive Index, Relief, and the Becke Line Test
06:16 Properties in PPL - Cleavage
06:53 Isotropic vs Anisotropic minerals
08:01 Properties in PPL - Pleochroism
09:05 Properties in plane-polarized light and properties in cross-polarized light