18:31

Rock Identification with Willsey: Intro to Metamorphic Rocks!

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Intro to Igneous Rock Identification

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Rock Identification with Willsey: Foliated Metamorphic Rocks - Slate, Phyllite, Schist, and Gneiss

28:20

Rock Identification with Willsey: Intro to Igneous Rocks!

19:17

Rock and Mineral Identification

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Quartz vs. Quartzite

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Gold Expert Reveals What GOLD Looks Like in Ore Rocks

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Rock Identification with Willsey: BASALT and its many varieties