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MINERALS AND THEIR USES

MINERALS AND THEIR USES. Donna Herrema. TALC. Color: sea green, white, gray Greenish white streak Fracture: perfect Texture: soft soapy Luster: pearly Hardness: 1. Paint, paper, ceramics. COPPER. Color: dull brown Streak: red Fracture: none Texture: bendable Luster: metallic

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MINERALS AND THEIR USES

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  1. MINERALS AND THEIR USES Donna Herrema

  2. TALC • Color: sea green, white, gray • Greenish white streak • Fracture: perfect • Texture: soft soapy • Luster: pearly • Hardness: 1 Paint, paper, ceramics

  3. COPPER • Color: dull brown • Streak: red • Fracture: none • Texture: bendable • Luster: metallic • Hardness: 2.5-3 Electrical wiring Pots and pans

  4. GALENA Batteries, lead pipe • Color: lead gray • Streak: lead gray • Fracture: perfect cube • Texture: smooth, heavy • Luster: metallic • Harness: 2.5

  5. Halite • Color: colorless, clear • Streak: white • Fracture: perfect cube • Texture: smooth, tastes salty • Luster: transparent • Hardness: 2.5 Salt

  6. Quartz (chert) • Color: yellowish • Streak: colorless • Fracture: conchoidal • Texture: hard brittle edges razor sharp • Luster: dull waxy • Hardness: 7 Indian arrowheads

  7. GRAPHITE Lubricant, pencils • Color: gray • Streak: black • Fracture: perfect • Texture: slick, oily • Luster: dull metal • Hardness: 1.0

  8. Hematite Wrought Iron railings, paint pigment. • Color: gray, red, black • Streak: reddish brown • Fracture: uneven • Texture: • Luster: metallic dull • Hardness: 5.0-6.0

  9. MICA • Color: black • Streak: • Fracture: sheets, flakes easily • Texture: smooth • Luster: pearly • Hardness: 2 - 3 Wallpaper, insulated wiring, paint, pioneer windows

  10. Pyrite • Color: brass yellow • Streak: green to brown • Fracture: indistinct • Texture: rough • Luster: metallic • Hardness: 6-6.5 useless

  11. Quartz • Color: clear • Streak: colorless • Fracture: conchoidal • Texture • Luster: transparent • Harness: 7 Eye glasses, glass, electronics

  12. FELDSPAR • Color: pink • Streak: none • Fracture: cube • Texture • Luster: milky • Hardness: 6.5 Fiberglass pools, dishes, glass containers

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