MINERALS AND THEIR USES by 5W6wBuA

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									MINERALS AND THEIR USES

      Donna Herrema
TALC
   Color: sea green,
    white, gray
   Greenish white
    streak          Paint, paper, ceramics
   Fracture: perfect
   Texture: soft soapy
   Luster: pearly
   Hardness: 1
COPPER
   Color: dull brown
   Streak: red         Electrical
   Fracture: none      wiring
   Texture: bendable   Pots and
   Luster: metallic    pans

   Hardness: 2.5-3
GALENA          Batteries, lead pipe

   Color: lead gray
   Streak: lead gray
   Fracture: perfect
    cube
   Texture: smooth,
    heavy
   Luster: metallic
   Harness: 2.5
      Halite
   Color: colorless, clear
   Streak: white
   Fracture: perfect cube
   Texture: smooth,
                              Salt
    tastes salty
   Luster: transparent
   Hardness: 2.5
Quartz (chert)
   Color: yellowish
   Streak: colorless
   Fracture: conchoidal
   Texture: hard brittle
    edges razor sharp
   Luster: dull waxy
   Hardness: 7
                            Indian arrowheads
                       Lubricant, pencils
GRAPHITE
   Color: gray
   Streak: black
   Fracture: perfect
   Texture: slick, oily
   Luster: dull metal
   Hardness: 1.0
                    Wrought Iron railings,
                    paint pigment.
Hematite
   Color: gray, red,
    black
   Streak: reddish
    brown
   Fracture: uneven
   Texture:
   Luster: metallic dull
   Hardness: 5.0-6.0
    MICA
       Color: black
       Streak:
       Fracture: sheets,
        flakes easily
       Texture: smooth
       Luster: pearly
       Hardness: 2 - 3
Wallpaper, insulated
wiring, paint,
pioneer windows
 Pyrite
    Color: brass yellow
    Streak: green to
     brown
    Fracture: indistinct
    Texture: rough
    Luster: metallic
    Hardness: 6-6.5
useless
Quartz
   Color: clear
   Streak: colorless
   Fracture: conchoidal
   Texture
   Luster: transparent
   Harness: 7

      Eye glasses, glass,
      electronics
FELDSPAR
   Color: pink
   Streak: none
   Fracture: cube
   Texture
   Luster: milky
   Hardness: 6.5
Fiberglass pools, dishes,
glass containers

								
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