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Pyroxene Amphibole Plagioclase Feldspar Olivine Garnet Quartz Fluorite

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Presentation on theme: "Pyroxene Amphibole Plagioclase Feldspar Olivine Garnet Quartz Fluorite"— Presentation transcript:

1 Pyroxene Amphibole Plagioclase Feldspar Olivine Garnet Quartz Fluorite
Good cleavage in 2 90o dark green to black , H 6 Pyroxene Name _____________ Cleavage prominent Good cleavage in 2 56o and 124o, dark green to black or brown, H 6 Amphibole Harder than glass Plagioclase Feldspar Good cleavage in 2 90o ,gray to blue-gray, H ~ 6, one face may be striated Olivine Small grains olive color, glassy, H Cleavage absent Non Metallic Luster, Dark Color Red, brown, yellow, glassy, H , poor or no cleavage, crystals 12-sided (dodecahedrons) Garnet Quartz Conchoidal fracture, H 7, glassy Good cleavage 4 dir, many possible colors, H 4 Fluorite Cleavage prominent Mica Perfect cleavage 1 dir, sheets, lt.brown to black, H 2 – 3 Softer than glass Red earthy appearance, red streak, appears H 1.5 Hematite Cleavage absent Yellow brown earthy appearance, yellow brown streak, already powdered so appears H 1.5 Limonite

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