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Biotite (Mica)
Dark colored
Streak: White to gray
Luster: Vitreous
Hardness: 2.5-3
Cleavage: 1 Plane
Other Properties: Thin Sheats
Calcite
Variable to clear
Streak: White to gray
Luster: Vitreous to Earthy
Hardness: 3
Cleavage: 3 Planes (perfect) - rhombohedral
Other Properties: Reacts with HCL acid
Copper
Copper
Streak: Copper
Luster: Metallic / Dull
Hardness: 2.5 -3
Cleavage: None
Other Properties: Tarnishes brown or green
Corundum
Red- gray to brown or gray
Streak: White
Luster: Dull
Hardness: 9
Cleavage: None
Other Properties: Hexagonal Crystals
Fluorite
Variable Color
Streak: White
Luster: Vitreous (Clear)
Hardness:4
Cleavage: 4 Planes (Octahedral)
Other Properties: Used in Toothpaste
Galena
Shiny Silver Gray or Dull Gray
Streak: Gray - Dark Gray
Luster: Metallic
Hardness: 2.5
Cleavage: 3 Planes at 90 (Cubic)
Other Properties: High Specific Gravity
Gypsum
White, Clear, Variable
Streak: White
Luster: Vitreous
Hardness: 2
Cleavage: No Cleavage or 1 plane
Other Properties: None
Halite
Clear to gray yellow to red
Streak: White
Luster: Vitreous
Hardness: 2.5
Cleavage: 3 Planes at 90 (PERFECT)
Other Properties: SALTY
Hematite (Specular)
Steel Gray
Streak: RED
Luster: Metallic
Hardness: 5-6
Cleavage: None
Other Properties: 2 forms
Hematite (Earthy)
Red
Streak: RED
Luster: Dull
Hardness: 1.5 -3
Cleavage: None
Other Properties: 2 forms
Hornblende (Amphibole)
Dark Greek to Black
Streak: White
Luster: Vitreous
Hardness: 5 -6
Cleavage: 2 planes 56-124
Other Properties: None
Kaolinite (Clay)
White, Dirty White
Streak: white
Luster: Dull
Hardness: 2 - 2.7
Cleavage: No Apparent (too soft)
Other Properties: Earthy Smell
Limonite
Yellow
Streak: Yellow - brown
Luster: Dull (Earthy)
Hardness: 1.5 - 5.5
Cleavage: None
Other Properties: None
Magnetite
Dark Gray - Black
Streak: Dark Gray
Luster: Metallic
Hardness: 6
Cleavage: None Apparent
Other Properties: MAGNETIC
Muscovite (Mica)
White to clear silver
Streak: White
Luster: Vitreous
Hardness: 2.5 - 3
Cleavage: 1 plane - sheets
Other Properties: THIN SHEETS
Olivine
Green to Dark Green
Streak: White to shades of green
Luster: Vitreous
Hardness: 6.5 -7
Cleavage: Indistinct / None
Other Properties: Granular or grainy
Potassium Feldspar
L. color, white, cream, pink
Streak: white
Luster: Vitreous
Hardness: 6
Cleavage: 2 planes nearly 90
Other Properties: Pink variety is common
Plagioclase Feldspar
L. color variable
Streak: White
Luster: Vitreous
Hardness: 6 - 6.5
Cleavage: 2 planes nearly 90
Other Properties: Striations
Pyrite
Brass Yellow
Streak: Black, dark green, brown black
Luster: Metallic
Hardness: 6 - 6.5
Cleavage: None - FRACTURE
Other Properties: Cubic crystals with striations (Fool's Gold)
Pyroxene (Augite)
Dark Green to Black
Streak: white to gray
Luster: Vitreous
Hardness: 5.5 - 6
Cleavage: 2 planes of nearly 90
Other Properties: None
Quartz
Variable L & D
Streak: None
Luster: Vitreous / Shiny
Hardness: 7
Cleavage: Conchoidal - FRACTURE
Other Properties: Scratches Glass
Sphalerite
Bronze to Yellow - Brown
Streak: White to pale, yellow - brown
Luster: Vitreous (cleavage face) to Metallic (crystal faces)
Hardness: 3.5 - 4
Cleavage: Excellent
Other Properties: Rotten Egg Smell, 2 Lusters
Sulfur
Yellow to Red
Streak: Pale Yellow
Luster: None
Hardness: 1.5 - 2.1
Cleavage: None
Other Properties: Rotten Egg Smell
Talc
Gray to light green
Streak: White
Luster: Pearly, greasy, or dull
Hardness: 1
Cleavage: No cleavage
Other Properties: Soapy Feel
Granite
Origin: Instrusive, slow cooling
Texture: Phaneritic
Composition: Felsic
Diorite
Origin: Intrusive, slow cooling
Texture: Phaneritic
Composition: Intermediate
Gabbro
Origin: Instrusive, slow cooling
Texture: Phaneritic
Composition: Mafic
Peridotite
Origin: Instrusive, slow cooling
Texture: Phaneritic
Composition: Ultramafic
Rhyolite
Origin: extrusive, rapid cooling
Texture: Aphanitic
Composition: Felsic
Andesite
Origin: Extrusive, Rapid Cooling
Texture: Aphanitic
Composition: Intermediate
Basalt
Origin: Extrusive, Rapid Cooling
Texture: aphantic
Composition: Mafic
Obsidian
Origin: Extrusive Rapid Cooling
Texture: Glassy
Compostion: Minerals had no time to form
Pumice
origin: Extrusive Rapid Cooling
Texture: Vesicular
Composition: Felsic and Intermediate
Vesicular Basalt
Origin: Extrusive, Rapid Cooling
Texture: Vesicular
Composition: Mafic
Volcanic Tuff
Origin: Extrusive, Rapid Cooling
Texture: Pyroclastic
Composition: fragments of Tephra
Shale
Composition: Clay
Type: Detrital; Mud, round
Sorting: Well
Arkosic Sandstone
Composition: Rock Fragments or mineral grains
Type: Detrital; Gravel, round
Sorting: Moderate
Quartz Sandstone
Composition: Sand
Type: Detrital; Sand, round
Sorting: Well
Lithic Sandstone
Composition: Rock Fragments
Type: Detrital; Sand, round
Sorting: Well
Conglomerate
Composition: Rock fragments and mineral grains
Type: Detrital; Gravel, rounded
Sorting: Moderate to poor
Breccia
Composition: Rock Fragments and mineral grains
Type: Detrital; Gravel, Angular
Sorting: Poor
Rock Salt
Composition: Halite
Type: Chemical(inorganic)
Info: Softer than glass, salty taste
Rock Gypsum
Composition: gypsum
Type: Chemical(inorganic)
Info: Softer than finger nail, sugary look
Oolitic Limestone
Composition: Calcite; spherical grains(ooids)
Type: Chemical(inorganic)
Info: Easy to tell
Chert
Composition: Quartz
Type: Chemical(inorganic)
Info: Conchoidal Fracture, harder than glass
Peat
Composition: Plant Fragments
Type: Biochemical(organic)
Info: visible plant remains, first stage of coal
Lignite
Bituminous Coal
Composition : Carbonized Plant Fragments
Type: Biochemical(Organic)
Info: Black to dark brown; brittle; sooty; light in mass
Micrite Limestone
Chalk
Composition: Calcite(limestone)
Type: Biochemical(organic)
Info: Microscopic shells, powdery Reacts with HCl!!!!
Coquina
Composition: Calcite(Limestone)
Type: Biochemical(organic)
Info: Well sorted hash of shell fragments, porous, little visible matrix or cement
Fossiliferous Limestone
Composition: Calcite(Limestone)
Type: Biochemical(organic)
Info: Fossilized shell in a fine grain matrix
Slate
Luster:dull
Cleavage: 1 direction(salty rock cleavage)
Info: Rings when tapped with a nail, foliated
Phyllite
Luster: Satiny
Cleavage: Breaks along wrinkled or foliated planes
Info: small micaceous minerals barely visible, foliated
Schist
Luster: Platy minerals?
Cleavage: along scaly foliation
Info: possible in many mineral varieties
Gneiss
Luster: Dull
Cleavage: ?
Info: Genissic Banding along light and dark mineral bands
Anthracite Coal
Luster: Shiny
Cleavage: Fracture
info: black, made of Carbon
Marble
Luster: Satiny?
Info: Reacts with acid; softer than glass; many color varieties
Quartzite
Luster: Shiny
Info: grains not rub off like sandstone, harder than glass
Serpentinite
Luster: dull Metamorphic, non-foliated