Tectosilicates
![](https://i.ytimg.com/vi/jg9PscK_HBc/mqdefault.jpg)
1:01:41
Phyllosilicates
![](https://i.ytimg.com/vi/ryNQBxmcOu8/mqdefault.jpg)
8:43
Types of Silicates Part 1: Orthosilicates, Disilicates, and Cyclosilicates
![](https://i.ytimg.com/vi/qhJekM9Vn_c/mqdefault.jpg)
1:05:34
Crystallography
![](https://i.ytimg.com/vi/c42emStFEnE/mqdefault.jpg)
1:09:48
Uniaxial Optics
![](https://i.ytimg.com/vi/TkFU3xly4S4/mqdefault.jpg)
29:40
Paleogeography
![](https://i.ytimg.com/vi/ISnxs-NlRYg/mqdefault.jpg)
1:49:55
How To Speak Fluently In English About Almost Anything
![](https://i.ytimg.com/vi/BUTuJ885k5s/mqdefault.jpg)
1:14:11
Optics of Anisotropic Minerals
![](https://i.ytimg.com/vi/ZLk6IjBZteI/mqdefault.jpg)
1:13:20