7:51

21) Sulfate Minerals

17:27

Minerals with Willsey: Hematite, Magnetite, Galena, and Pyrite

11:27

18) Metamorphic Silicates

24:19

Minerals with Willsey: Feldspars

10:14

22) Sulfide Minerals

9:27

That's how you'll find RUBIES and SAPPHIRES - #crystals #gems

18:22

How to Make Mercury Metal from Cinnabar Ore in Element Series - Episode 7

8:19

16) Olivine Pyroxene and Amphibole