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IG. Crystal Shape Under certain ideal circumstances, minerals grow so that they are bounded by flat faces to form regular geometric solids called crystals. Although crystals may resemble cleavage fragments, they are not cleavage fragments because crystals are the result of growth, not breakage. Commonly, crystals are characteristic of specific mineral species and can be used to identify them. Examine the three micromounts under the binocular microscope. Each slide contains only one mineral species and variations of one crystal shape. These shapes are illustrated in Figure 5. Note that in some cases two or more crystals may be grown together. For each slide, choose the crystal shape from those shown in Figure 5 that most resembles the ones on the slide. (Note that only about one in ten of the black grains show crystals shapes; the rest are irregular.) Record the results of your survey of the three micromounts in the table below. MICROMOUNT Single, clear crystal Red crystals Black crystals CRYSTAL SHAPE (A.B or C) Vanadinite De O Shape A Shape C Quartz Shape B Chromite MINERAL FIGURE 5: Crystal shapes of three minerals

IG. Crystal Shape Under certain ideal circumstances, minerals grow so that they are bounded by flat faces to form regular geometric solids called crystals. Although crystals may resemble cleavage fragments, they are not cleavage fragments because crystals are the result of growth, not breakage. Commonly, crystals are characteristic of specific mineral species and can be used to identify them. Examine the three micromounts under the binocular microscope. Each slide contains only one mineral species and variations of one crystal shape. These shapes are illustrated in Figure 5. Note that in some cases two or more crystals may be grown together. For each slide, choose the crystal shape from those shown in Figure 5 that most resembles the ones on the slide. (Note that only about one in ten of the black grains show crystals shapes; the rest are irregular.) Record the results of your survey of the three micromounts in the table below. MICROMOUNT Single, clear crystal Red crystals Black crystals CRYSTAL SHAPE (A.B or C) Vanadinite De O Shape A Shape C Quartz Shape B Chromite MINERAL FIGURE 5: Crystal shapes of three minerals

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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IG. Crystal Shape Under certain ideal circumstances, minerals grow so that they are bounded by flat faces to form regular geometric solids called crystals. Although crystals may resemble cleavage fragments, they are not cleavage fragments because crystals are the result of growth, not breakage. Commonly, crystals are characteristic of specific mineral species and can be used to identify them. Examine the three micromounts under the binocular microscope. Each slide contains only one mineral species and variations of one crystal shape. These shapes are illustrated in Figure 5. Note that in some cases two or more crystals may be grown together. For each slide, choose the crystal shape from those shown in Figure 5 that most resembles the ones on the slide. (Note that only about one in ten of the black grains show crystals shapes; the rest are irregular.) Record the results of your survey of the three micromounts in the table below. MICROMOUNT Single, clear crystal Red crystals Black crystals Shape A Vanadinite CRYSTAL SHAPE (A, B or C) Shape B Chromite Shape C Quartz FIGURE 5: Crystal shapes of three minerals. MINERAL
Transcribed Image Text:IG. Crystal Shape Under certain ideal circumstances, minerals grow so that they are bounded by flat faces to form regular geometric solids called crystals. Although crystals may resemble cleavage fragments, they are not cleavage fragments because crystals are the result of growth, not breakage. Commonly, crystals are characteristic of specific mineral species and can be used to identify them. Examine the three micromounts under the binocular microscope. Each slide contains only one mineral species and variations of one crystal shape. These shapes are illustrated in Figure 5. Note that in some cases two or more crystals may be grown together. For each slide, choose the crystal shape from those shown in Figure 5 that most resembles the ones on the slide. (Note that only about one in ten of the black grains show crystals shapes; the rest are irregular.) Record the results of your survey of the three micromounts in the table below. MICROMOUNT Single, clear crystal Red crystals Black crystals Shape A Vanadinite CRYSTAL SHAPE (A, B or C) Shape B Chromite Shape C Quartz FIGURE 5: Crystal shapes of three minerals. MINERAL
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Step 1
MICROMOUNT CRYSTAL SHAPE MINERAL
Single clear crystal C Quartz
Red crystals A Vanadinite
Black crystals B Chromite
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