Geology 101 with Willsey, Episode #7: Minerals, Part One
14:42
Geology 101 with Willsey, Episode #8: Minerals, Part Two
24:19
Minerals with Willsey: Feldspars
19:55
The Surprising Map of Plants
7:59
Macroscopic Characteristics of Minerals Part 1: Luster and Color
22:34
Geology 101 with Willsey, Episode #6: Hot Spots
32:19
Geology 101 with Willsey, Episode #9: Igneous Rocks, Part One
16:04
Identifying Minerals -- Earth Rocks!
21:41