Sedimentary Review

Arkosik Sandstone

Color: rosy, gray

Features: gravel (smaller than conglomerate)

Chert

Color: gray, brown

Features: hard, layered colors

Coal

Color: black

Features: smooth, mudrock, lightweitght

Conglomerate

Color: orange, brown, rust

Features: large rounded pieces, gravel

Fossiliferous Limestone

Color: gray, brown

Features: reacts with HCl, visible fossilized organisms

Limestone

Color: gray

Features: smooth, reacts with HCl

Quartz Sandstone

Color: brown, gold, red, pink

Features: sandy, light layers, soft, small grains like beach

Rock Gypsum

Color: white, off-white

Features: looks like Gypsum mineral, lightweight, soft

Shale

Color: gray, dark gray

Features: soft, layers, flat-sided

Minerals--QUIZ YOURSELF!

Minerals Review

Amphibole

Luster: viteous

Streak: none

Hardness: Scratches glass

Cleavage

Color: black, dark gray

Biotite

Luster: vitreous

Streak: none

Harness: won't scratch glass, breaks into sheets

Cleavage

Color: dark brown, black

Calcite

Luster: glassy

Streak: none

Hardness: won't scratch glass

Cleavage (rhombus)

Color: white, colorless, clear

Cryptocrystalline Quartz

Luster: waxy

Streak: none

Hardness: scratches glass

Conchoidal fracture

Color: banded, darker colors

Galena

Luster: metallic

Streak: dark gray

Hardness: won't scratch glass

Cleavage

Color: silver, gray, black

Gypsum

Luster: dull to glassy

Streak: none

Hardness: won't scratch glass

Cleavage or fracture

Color: white, gray, pink, clear

Halite

Luster: glassy

Streak: none

Hardness: won't scratch glass

Cleavage (cube)

Color: clear, transparent

*Salty taste

Hematite

Luster: dull, earthy

Streak: reddish brown

Hardness: won't scratch glass

Fracture

Color: red, brown, black, dark gray

Kaolonite

Luster: dull

Streak: none

Hardness: won't scratch glass

Fracture

Color: white

*Think chalk or talc

Limonite

Luster: dull, earthy

Streak: orange-brown

Hardness: won't scratch glass

Fracture

Color: yellow, orange, brown, black

Magnetite

Luster: dull to metallic

Streak: black, gray

Hardness: Scratches glass

Cleavage or Fracture

Color: black, dark gray

*Magnetic

Muscovite

Luster: vitreous, glassy

Streak: none

Hardness: won't scratch glass, breaks into sheets

Cleavage

Color: yellow, gold, clear, white

Olivine

Luster: dull to vitreous

Streak: none

Hardness: scratches glass

Fracture

Color: olive green

Plagioclase Feldspar

Luster: pearly, vitreous

Streak: none

Hardness: scratches glass

Cleavage

Color: white, blue-gray, black

*Reddish striations on some samples

Potassium Feldspar

Luster: pearly, vitreous

Streak: none

Hardness: scratches glass

Cleavage

Color: pink, white, green

Pyrite

Luster: metallic

Streak: green-black

Hardness: scratches glass

Fracture

Color: gold, brown

Pyroxene

Luster: dull to vitreous

Streak: none

Hardness: scratches glass

Cleavage

Color: black, dark green, brown

Quartz

Luster: glassy, vitreous

Streak: none

Hardness: scratches glass

Fracture

Color: white, pink, purple