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Geology 101 Minerals

Memorizing Minerals, FTW

QuestionAnswer
Luster-Metallic Hardness-3.5-4.0 Streak-Dark Gray DP-Bright silvery gold, brittle, no cleavage Chalcopyrite
Luster-Nonmetallic Hardness-7 Streak-White* DP-Opaque Gray or white, waxy luster Chert
Luster-Nonmetallic Hardness-2.0-2.5 Streak-White DP-Dark green, excellent cleavage Chlorite
Luster-Metallic Hardness-5.5-6.0 Streak-Dark brown DP-silvery black to black, no cleavage, weakly magnetic Chromite
Luster-Nonmetallic Hardness-2.0-4.0 Streak-very light blue DP-pale blue to blue-green, opaque, Chrysocolla
Luster-Metallic Hardness-2.5-3.0 Streak-Copper DP-Copper, no cleavage Copper
Luster-Nonmetallic Hardness-9.0 Streak-White* DP-Gray, white, black, colored (blue, red, brown, yellow), cleavage absent Corundum
Luster-Nonmetallic Hardness-3.5-4.0 Streak-White DP-White, gray, creme, pink, cleavage excellent, resembles calcite (does not effervesce) Dolomite
Luster-Nonmetallic Hardness-5.5-6.0 Streak-White DP-Dark or pale green, good cleavage Actinolite (Amphibole)
Luster-Nonmetallic Hardness-5.0 Streak-White DP-pale, dark green, brown, blue, white, purple, sometimes colorless, brittle Apatite
Luster-Nonmetallic Hardness-5.5-6.0 Streak-White to pale gray DP-Dark green to gray, 2 good cleavages Augite
Luster-Nonmetallic Hardness-3.5-4.0 Streak-Light blue DP-distinctive deep blue, brittle, effervesces in HCl Azurite
Luster-Nonmetallic Hardness-3.0-3.5 Streak-White DP-Colorless to white, tints of red, brown, yellow, blue; brittle, cleavage good to excellent Barite
Luster-Nonmetallic Hardness-1.0-3.0 Streak-White DP-Brown earthy rock w/ shades of gray, white yellow; Bauxite
Luster-Nonmetallic Hardness-2.5-3.0 Streak-Gray-brown DP-black, green-, brown-black; cleavage excellent; thin flexible sheets Biotite Mica
Luster-Metallic Hardness-3.0 Streak-Dark Gray to black DP-Brownish-bronze, weakly magnetic, cleavage absent/poor Bornite
Luster-Nonmetallic Hardness-3.0 Streak-White DP-colorless, white or yellow, but can be green, brown, pink; excellent cleavage, effervesces in dilute HCl Calcite
Luster-Nonmetallic Hardness-7.0 Streak-White* DP-Colorless, white, yellow, light brown, often translucent, waxy luster Chalcedony
Luster-Nopnmetallic Hardness-6.0-7.0 Streak-White* DP-Pale or dark green to yellow green, poor cleavage Epidote
Luster-Nonmetallic Hardness-7.0 Streak-White* DP-Black to dark gray Flint
Luster-Nonmetallic Hardness-4.0 Streak-White DP-Colorless, purple, blue, gray, green, yellow, excellent cleavage Fluorite
Luster-Metallic Hardness-2.5 Streak-Gray to Dark Gray DP-Bright silvery gray, brittle, good cleavage Galena
Luster-Nonmetallic Hardness-7.0 Streak-White* DP-Usually red, black, or brown, sometimes yellow, green, pink, cleavage absent, brittle Garnet
Luster-Metallic Hardness-5.0-5.5 Streak-Yellow-brown DP-Dark brown to black Goethite
Luster-Metallic Hardness-1.0 Streak-Dark Gray DP-Silvery gray to black, flakes, feels greasy, you can write with it Graphite
Luster-Nonmetallic Hardness-2.0 Streak-White DP-Colorless, white, or gray, very soft, translucent Gypsum
Luster-Nonmetallic Hardness-2.5 Streak-White DP-Colorless, white, yellow, brown, red; brittle, SALT Halite
Luster-Metallic or Nonmetallic Hardness-1.0-6.0 Streak-Red to Red brown DP-silvery gray, reddish silver, black, or brick red, may be magnetic; soft (earthy) and hard (metallic) have same streak Hematite
Luster-Nonmetallic Hardness-5.5 Streak-white to pale gray DP-Dark gray to black, good cleavage, brittle Hornblende (Amphibole)
Luster-Nonmetallic Hardness-1.0-2.0 Streak-White DP-White to very light brown, cleavage excellent, but not in hand samples Kaolinte
Luster-Nonmetallic Hardness-4.0-7.0 Streak-White* DP-Blue, pale green, white or gray, Kyanite
Luster-Metallic or Nonmetallic Hardness-1.0-5.5 Streak-Yellow Brown DP-Yellow-brown to dark brown, luster is dull or earthy Limonite
Luster-Metallic Hardness-6.0-6.5 Streak-Dark Gray DP-Silvery gray to black, no cleavage, magnetic Magnetite
Luster-Nonmetallic Hardness-3.5-4.0 Streak-Green DP-Green, pale green, or gray green; effervesces in dilute HCl Malachite
Luster-Nonmetallic Hardness-5.0-5.5 Streak-White DP-Colorless, white, gray, pale green, yellow, or red; silky luster Natrolite (Zeolite)
Luster-Nonmetallic Hardness-2.0-2.5 Streak-White DP-Colorless, yellow, brown, or red-brown; cleavage excellent, split into thin flexible sheets Muscovite Mica
Luster-Nonmetallic Hardness-7.0 Streak-White* DP-Pale or dark olive-green to yellow, or brown, cleavage absent Olivine
Luster-Nonmetallic Hardness-5.0-5.5 Streak-White DP-Colorless to white, orange, yellow, brown, blue, gray, green, or red (may have play of colors); cleavage absent Opal
Luster-Nonmetallic Hardness-6.0 Streak-White DP-Colorless, white, gray, black (may have iridescent play of colors), cleavage good Plagioclase Feldspar
Luster-Nonmetallic Hardness-6.0 Streak-White DP-Orange, brown, white, green, pink; cleavage excellent Potassium Feldspar (K-Spar)
Luster-Metallic Hardness-6.0-6.5 Streak-Dark Gray DP-Silvery gold, cleavage absent to poor Pyrite (Fool's Gold)
Luster-Nonmetallic Hardness-7.0 Streak-White* DP-Colorless, white or gray; varieties exist in all colors (black, yellow-brown, purple, red and yellow, pink); no cleavage; Quartz
Luster-Nonmetallic Hardness-2.0-5.0 Streak-White DP-pale or dark green, yellow, gray, no cleavage Serpentine
Luster-Nonmetallic Hardness-6.0-7.0 Streak-White DP-pale brown, white, gray; one good cleavage Sillimanite
Luster-Metallic or Nonmetallic Hardness-3.5-4.0 Streak-White to pale yellow-brown DP-Silvery yellow-brown, dark red or black, cleavage excellent-good, smells like rotten eggs when scratched/powdered Sphalerite
Luster-Nonmetallic Hardness-7.0 Streak-White to gray* DP-Brown to gray-brown; poor cleavage Staurolite
Luster-Nonmetallic Hardness-1.5-2.5 Streak-Pale Yellow DP-bright yellow, poor cleavage Sulfur
Luster-Nonmetallic Hardness-1.0 Streak-White DP-White, gray, pale green, or brown; feels greasy or soapy, no cleavage Talc
Luster-Nonmetallic Hardness-7.0-7.5 Streak-White* DP-usuallty opaque black or green, may be translucent/transparent green, red, yellow, pink or blue; cleavage absent Tourmaline
Created by: 1800218888
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