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Minerals

Minerals. Mrs. Fritts 7 th Grade Science. Fluorite. Fluorite is used in: Toothpaste “Fluoride” Pottery Ceramics Paint Pigment. Halite (Rock Salt). Evaporation of lakes, seas Commonly recognized as salt, halite is used in human and animal diet, food seasoning and food preservation

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Minerals

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  1. Minerals Mrs. Fritts 7th Grade Science

  2. Fluorite Fluorite is used in: • Toothpaste “Fluoride” • Pottery • Ceramics • Paint Pigment

  3. Halite (Rock Salt) • Evaporation of lakes, seas • Commonly recognized as salt, halite is used in human and animal diet, food seasoning and food preservation • Mineral waters • Soap • Home water softeners • Highway de-icer • Ice Cream production

  4. Marble • Used as stone in building construction and for making decorative items such as pillars, floor and bath tiles, table tops etc.

  5. Talc • Softest • Baby powder • Astringent for rashes • Soapstone • Gymnastics to grasp Bars

  6. Copper • Conductor • Currency • Electrical wires • Sculptures • Computer circuits and chips

  7. Quartz • Gemstones • Glass manufacturing • Radios • Computers • Electronic equipment • Piezoelectric property • Quartz clock

  8. Diamond • Hardest Mineral • Cutting tools • Dentist Drill • Blades • Saws • Commercial Items

  9. Mining for Ores • A cheap way of locating ore deposit and bringing it to the surface is to blast away the soil and rock which is called “overburden” • Toxins - mercury, arsenic, selenium and lead • When gold is extracted, it is crushed and sprayed with cyanide, which bonds with the gold. Cyanide then leaches. A dose of cyanide the size of a grain of rice is enough to kill a human while one millionth of a gram per liter of water is enough to kill fish.

  10. The damage to land after a large-scale mining operation has finished is devastating and leaves the landscape so polluted that it cannot properly sustain life for thousands of years.

  11. Mineral ID Lab Introduction • Performing Two Physical Property Tests • Hardness Test • Streak Test • Use these two tests to identify a mineral

  12. Streak Test • Often, minerals have a different color streak than the original color of the mineral. • Test the streak of the minerals with a Streak Plate and write down the streak you see. • Also, identify the color of the mineral • Sometimes minerals have the same color and streak , so geologists use another test….

  13. Color and Streak Test • Identifying six minerals using color and streak- • Garnet • Olivine • Red Hematite • Malachite • Magnetite • Hornblende

  14. Example Table

  15. Hardness Test Which minerals can scratch other minerals? 1 = Talc 2 = Gypsum 3 = Calcite 4 = Fluorite 5 = Apatite 6 = Feldspar 7 = Quartz 8 = Topaz 9 = Corundium 10 = Diamond Finger Nail = 2.5 Copper Penny = 3.0 Nail = 5.5 Glass Plate = 5.5 Steel File = 6.5

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