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University of Houston *
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Course
1303
Subject
Geology
Date
Apr 3, 2024
Type
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4
Uploaded by MajorPrairieDogPerson1075
1 Physical Geology Assignment 1: Minerals Identify each of the following minerals and the mineral group to which it belongs. Note the physical properties and consult the accompanying mineral identification key. Mineral groups are the silicates, carbonates, oxides, sulfides, sulfates, halides, and native elements. Questions Physical Properties Image 1. Mineral Name? Mineral group? Luster: nonmetallic Hardness: 4 Streak: white Cleavage: four directions 2. Mineral Name? Mineral group? Luster: nonmetallic Hardness: 3 Streak: red Cleavage: not prominent Ore of iron 3. Mineral Name? Mineral group? Luster: metallic Hardness: 2.5 Specific gravity: 7.6 Cleavage: cubic Ore of lead 4. Mineral Name? Mineral group? Luster: nonmetallic Hardness: 6 Specific gravity: 2.6 Cleavage: two directions at nearly right angles A common mineral in granite 5. Mineral Name? Mineral group? Luster: nonmetallic Hardness: 5-6 Specific gravity: 3.2 Cleavage: two directions at 60 degrees and 120 degrees Common in certain igneous rocks like andesite Fluorite
Halid
Hermatite
Galena
Potassium feldspur
Hornblende
Oxide
Sulfide
Silicates
Silicate
2 6. Mineral Name? Mineral group? Luster: metallic Hardness: 1 Specific gravity: 2.2 Feel: greasy Used in pencil lead 7. Mineral Name? Mineral group? Luster: nonmetallic Hardness: 3 Cleavage: three directions at 75 degrees (rhombohedral) Property: effervesces in HCl Common mineral in limestone 8. Mineral Name? Mineral group? Luster: nonmetallic: fibrous, silky Hardness: 2 (easily scratches with fingernail) Cleavage: 3 directions Used in plaster 9. Mineral Name? Mineral group? Luster: metallic Hardness: 6 Specific gravity: 5.2 Form: cubic crystals Also known as fool’s gold
10. Mineral Name? Mineral group? Luster: nonmetallic Hardness: 6-7 Crystal structure composed of isolated silica-oxygen tetrahedral Major mineral in Earth’s mantle
Graphite
Calcite
Gypsum
Pyrite
Olivine
Carbonate
Sulfate
Sulfide
Silicate
Native elements
3 11. Mineral Name? Mineral group? Luster: nonmetallic Hardness: 2.5 Cleavage: three directions at 90 degrees Salty taste 12. Mineral Name? Mineral group? Luster: nonmetallic Hardness: 2.5 Specific gravity: 9 Cleavage: none Sometimes tarnished to brown or green 13. Mineral Name? Mineral group? Luster: metallic Hardness: 6 Specific gravity: 5.2 Streak: black Ore of iron Magnetic 14. Mineral Name? Mineral group? Luster: nonmetallic, adamantine Hardness: 10 15. Mineral Name? Mineral group? Luster: nonmetallic, glassy Hardness: 6.5-7.5 Fracture: conchoidal Common mineral in a metamorphic rock called schist Halite
Native copper
Magnetite
Garnet
Halide
Native elements
Diamond
Oxide
Silicate
Native elements
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4 The following five minerals (16-20) include olivine, augite (pyroxene group), hornblende (amphibole group), biotite (mica group), and quartz. Match each of these minerals to the correct internal arrangement of silicon-oxygen tetrahedra. 16. Mineral Name? Mineral group? 17. Mineral Name? Mineral group? 18. Mineral Name? Mineral group? 19. Mineral Name? Mineral group? 20. Mineral Name? Mineral group? Augite
Biotite
Peridot
Quartz
Olivine
Silicate
Pyroxene
Mica
Fosterite
Silicate