Rocks

By: Kaytie Ray

Metamorphic Rocks

Identification

1. (Slate) (color) Grey (texture) foliated

2. (Schists) (color) any color (Luster) shiny (texture) foliated

3. (Gneiss) (color) Grey or pink with streaks (texture) foliated

4. (Marble) (color) Any color (texture) granular

5. (Quartzite) (color) any color (texture) granular

Sedimentary Rocks

Identification

1. (Shale) (Color) red, brown, and green (texture)

2. (Coal) (Color) black and various shades of brown

3. (Halite) (Color) Colorless, white, blue, purple, red, pink, yellow, orange, or gray

4. (Breccia) (Color) any color

5. (Sandstone) (Color) grey, yellow, red, and white

Igneous Rocks

Identification

1. Basalt

Color: Black or Grey

Texture: Dull

2. Granite

Color: Grey, Pink, Dark red, and White

Texture: Grainy texture

3. Obsidian

Color: Black, Grey, Tan, Blue, Red, Orange, Yellow, and Purple

Texture: Glassy

Luster: Glassy

4. Pumice

Color: White, Grey, Light Black, and Green

Texture: Glassy

5. Rhyolite

Color: White, Grey, and Light Black

Texture: Aphanitic (Crystals to small to see) or porphyritic (Different sized crystals)