Geology: Slate to Gneiss Metamorphic Rocks

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

Rock Identification with Willsey: Nonfoliated Rocks - Quartzite and Marble

Rock and Mineral Identification

Rock Identification with Willsey: Intro to Metamorphic Rocks!

Rock Identification with Willsey: Volcanic Rocks (Tuff, Obsidian, Pumice)

Rock Identification with Willsey: Intro to Igneous Rocks!

A Complete Guide to Tumbling Rocks—A Reliable Method

Icicle Creek Exotic Terranes

Shear criteria

Minerals with Willsey: Feldspars

Skagit Gneiss along Highway 20

Minerals with Willsey: Olivine, Pyroxene, and Amphibole

Quartz vs. Quartzite

Rock Identification with Willsey: Conglomerate, Breccia, and Diamictite

Granite Gneiss, how to identify granite gneiss.

Classifying igneous rocks | Describing composition and texture

Rock Identification with Willsey: Intro to rock types and useful ID tips

Rock Tumbling 101 | A Guide for Beginners

Roundup Part 117 (bucketlist relics plus gold & silver)

Minerals with Willsey: Calcite