Dynamic Earth Lab Midterm Study Guide

Dynamic Earth Lab Midterm Study Guide - October 10th, 2009...

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October 10 th , 2009 Dynamic Earth Lab Midterm Study Guide Mineral Identification Amphibole Made of = Na, Ca, Mg Fe, Al Luster = Nonmetallic Hardness = 6 Color = Dark green to black or brown Cleavage = 2 directions at approximately 60° and 120° Crystals = Prismatic 6-sided BP = Confused with pyroxene Biotite
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October 10 th , 2009 Luster = Nonmetallic Hardness = 2.5-3 Color = Brown to black Cleavage = 1 perfect cleavage BP = Thin flexible elastic sheets Calcite Made of = CaCO 3 Luster = Nonmetallic Hardness = 3 Color = White or pale yellow Cleavage = Perfect in 3 directions @ 75° BP = Effervesces in HCl, transparent to opaque Garnet Made of = Fe, Mg, Ca, Al, silicates
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October 10 th , 2009 Luster = Nonmetallic Hardness = 7-7.5 Color = Red, brown, or yellow with glassy luster Cleavage = Conchoidal fracture Crystals = 12 sided BP = Gem quality = Ruby Halite Made of = NaCl Luster = Nonmetallic Hardness = 2-2.5 Color = Colorless to white Cleavage = perfect cube BP = salty taste, dissolves in water
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October 10 th , 2009 Muscovite Luster = Nonmetallic Hardness = 2-3 Color = Transparent and colorless Cleavage = Perfect in 1 direction BP = Thin elastic sheets Olivine Luster = Nonmetallic Hardness = 6.5-7 Color = Olive green, transparent, glassy Cleavage = Conchoidal fracture
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October 10 th , 2009 BP = The only green one Plagioclase Feldspar Made of = Na Hardness = 5.5-6.5 Color = Milky white/tan to dark colored Cleavage = 2 directions at 90° BP = Has striations that can help differentiate from other feldspar
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October 10 th , 2009 Potassium Feldspar Made of = K Hardness = 5.5-6.5 Color = White, salmon, blue-green Cleavage = 2 directions at 90° BP = Often salmon or rarely blue Pyroxene Made of = Ca, Mg, Fe, Al silicates Luster = Nonmetallic Hardness = 6 Color = Dark green, black, brown
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October 10 th , 2009
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Dynamic Earth Lab Midterm Study Guide - October 10th, 2009...

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