Mineral Identification Properties
22:33
Minerals with Willsey: Mineral Properties
56:25
Geology 4 (Minerals)
25:49
The Basics of Mineral Identification
7:55
Cleavage and Fracture
16:04
Identifying Minerals -- Earth Rocks!
9:27
That's how you'll find RUBIES and SAPPHIRES - #crystals #gems
10:07
Mineral Habit
22:33