Mineral Identification Worksheet, Exercises of Mineralogy and Mineral Processing

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Name Class Identifying Minerals Worksheet 1, ACID TEST 2. HARDNESS SCALE 3. STREAK TEST Fizzing identifies calcite 1. tale 6. feldspar A streak on an unglazed tile and other carbonate minerals 2. gypsum 7. quartz 3. calcite 8. topaz 4, fluorite 9. corundum 5. apatite 10, diamond FIELD SCALE of hardness unglazed fizzing abject hardness Ly fingernail 215) . copper penny 3 y knife blade 5.5-6.0 os (E-W glass 65 4, SPECIFIC GRAVITY streak color mineral 5. CRYSTAL SHAPE red-brown hematite 6. COLOR black-green pyrite 7, CLEAVAGE or FRACTURE (Mica cleaves in flat sheets.) white calcites 8. LUSTER white halite 9. MAGNETIC PROPERTIES (Lodestone is magnetic.) dark grey galena 10. TASTE, FEEL, or SMELL (Halite tastes salty, tale and graphite feel greasy, wet kaolin smeils earthy.) 1. Use the above tables to tell how you could distinguish (tell apart) between the following pairs of minerals: a. Calcite & Quartz b. Talc & corundum c. Halite & quartz d. Galena & pyrite 2. Which two minerals on the hardness scale can be scratched by a fingernail? 3. Fluorite and quartz are frequently a beautiful purple color. However, only quartz is used as a gem stone. Give a reason why. 4. Which two minerals would be most useful as grains on sandpaper? Explain your answer.