Shared Flashcard Set

Details

Common mineral identification
various minerals
24
Geology
Undergraduate 1
02/04/2007

Additional Geology Flashcards

 


 

Cards

Term
Hematite
Definition
Red or black streak/color. Black variety rather flat. 2-6.5 hardness.
Term
Limonite
Definition
Earthy, usually soft. Rusty. 1-5.5
Term
Galena
Definition
Grey color/streak. Perfect cubic cleavage. Lightweight. 2.5
Term
Chalco-Pyrite
Definition
Gold in color, greenish black streak. Softer that pyrite. 3.5-4
Term
MAgnetite
Definition
MAgnetic
Term
Pyrite
Definition
Gold like. Green black streak. 6-6.5
Term
Talc
Definition
green, grey or white. White streak. Soapstone, feels greasy. 1 perfect cleavage. hardness 1
Term
Kaolin
Definition
white clor/streak. One perfect cleavage. MAssive. Grainy and flakey. 1.5-2.5
Term
Chlorite
Definition
GREEN! 1 perfect cleavage. Flexible flakes. MAssive. 1-2.5
Term
Biotite Mica
Definition
black, sheets. White streak. 2-2.5
Term
Muscovite Mica
Definition
silver/colorless. WHite streak. Brilliant luster. 2-2.5
Term
Halite
Definition
White. Salty. Cubic
Term
Sylvite
Definition
VERy salty/botter. Red tint
Term
Gypsum
Definition
colorless, white, PINK grey. White streak. 2. Flakes. 1-2 good cleavages. Fibrous masses.
Term
Calcite
Definition
white, colorless, grey, pink. White streak. disolves in the acid. twinning striations. 3
Term
Dolomite
Definition
white, grey, pink, white streak. dissolves only when powdered. rhomb-shaped crystals. Curved crystal faces. 3.5-4
Term
Sphalerite
Definition
Resinous luster. 6 cleavages. yellow/greenish brown or dark red. white/yellow/brown streak3.5-4
Term
Amphibole
Definition
black/dark green. gray/green/white. Acute angles. Twin planes. 5-6
Term
Pyroxene
Definition
black/dark green. green/gray/white streak. Right angle. 5-6
Term
Orthoclase Feldspar
Definition
white/buff/grey/pinkish. White streak. Usually Pink. right angles. NNO TWINNING> single twin common. 6
Term
Plagioclase Feldspar
Definition
grey or pink. right angles. TWINNING striations. 6
Term
Olivine
Definition
yellow green. WHite streak. Glassy, no cleavage, small grains. distinc color. 6-7
Term
Garnet
Definition
red/yellow green/brownish. White streak. 6.5-7.5
Term
Quartz
Definition
white/colorless/smokey/pink. White streak. No cleavage. Conchoidal fracture.
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