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Rocks and Minerals Practical

Rocks and Minerals Practical. Study!. GYPSUM. Cleavage : ONE PLANE. SULFUR. Streak : LIGHT YELLOW/ WHITE. FELDSPAR. Cleavage : TWO PLANES @ 90 °. TALC. Hardness : < 2.5 (1). CALCITE. Cleavage : THREE Planes NOT @ 90°. PYRITE. KAOLINITE. Luster :

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Rocks and Minerals Practical

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  1. Rocks and Minerals Practical Study!

  2. GYPSUM • Cleavage: ONE PLANE

  3. SULFUR • Streak: LIGHT YELLOW/ WHITE

  4. FELDSPAR • Cleavage: TWO PLANES @ 90°

  5. TALC • Hardness: < 2.5 (1)

  6. CALCITE • Cleavage: THREE Planes NOT @ 90°

  7. PYRITE

  8. KAOLINITE • Luster: Dull/Earthy

  9. GALENA • Luster: Metallic • VERY High Specific Gravity

  10. FLUORITE

  11. MUSCOVITE • Cleavage: ONE Plane • Luster: Glassy (Vitreous)

  12. GRAPHITE • Economic Uses: Pencil Lead Lubricant

  13. HORNBLENDE

  14. BIOTITE • Streak: NO Streak • Cleavage: ONE PLANE

  15. QUARTZ • Hardness > 5.5 (7)

  16. HEMATITE • Economic Use: Iron Ore

  17. HALITE • Hardness: 2.5 – 5.5 • Economic Use: SALT

  18. OLIVINE

  19. MAGNETITE • Economic Use: Iron Ore

  20. Rhyolite • Rock Type: Igneous • Texture: Fine-grained/ Porphyritic

  21. Conglomerate

  22. Granite • Rock Type: • Igneous • Texture: • Coarse- grained • Minerals: • Feldspar* • Quartz* • Biotite* • Hornblende

  23. Sandstone • Minerals: Quartz • Rock type: Sedimentary

  24. Pumice • Texture: Vesicular

  25. Bituminous Coal

  26. Quartzite • Rock type: Metamorphic

  27. Crystalline Limestone • Minerals: Calcite

  28. Slate

  29. Granite Porphyry • Texture: Porphyritic

  30. Marble • Rock type: Metamorphic

  31. Coquina Limestone • Minerals: Calcite • Rock type: Sedimentary

  32. Basalt • Rock type: Igneous

  33. Mica Schist • Minerals: Muscovite Biotite Quartz

  34. Obsidian • Texture: Glassy

  35. Gneiss

  36. Shale • Rock type: Sedimentary

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