Texture: Pegmatic

Composition: Felsic

Mineral Composition: Quartz and Feldspar

"Countertops"

Granite

Texture: Pyroclast 

Composition: Intermediate

Features: Angular fragments

Volcanic Breccia

Texture: Pegmatic

Composition: Felsic

Mineral Composition: Quartz and Feldspar

"Countertops"

Pegmatite-Granite

Texture: Glassy/Shiny

Composition: Felsic/Mafic

"Arrowheads" 

Obsidian 

Texture: Pyroclast-Vesicular

Composition: Felsic

Pumice

Texture: Pyroclast-Aphanitic

Composition: Felsic

Tuff

Texture: Pyroclast-Phaneritic, contains vesicles

Composition: Mafic

Red to Black in color

Texture: Phaneritic

Composition: Ultramafic

Mineral Composition: Olivine

Large part of the Mantle

Periodtite

Texture: Aphanitic

Composition: Mafic

Mineral Composition: Fe and Mg

Abundant on the seafloor

Basalt

Texture: Aphanitic

Composition: Felsic

Mineral Composition: Quartz, Potassium Feldspar, Sodium Plagioclast, Amphibole, Biotite, Muscovite

Rhyolite

Texture: Phaneritic

Composition: Intermediate

Diorite

Texture: Phaneritic

Composition: Intermediate

Porphyritic Andesite

Texture: Phaneritic

Composition: Mafic

Lower ocean crust

Gabbro

Texture: Aphanitic

Composition: Felsic

Mineral Composition: Quartz, Potassium Feldspar, Sodium Plagioclast, Amphibole, Biotite, Muscovite

Rhyolite