Flashcard Set Preview
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| 1 |
 Hardness of 6. cannot be scratched by streak plate, Silicate Felsic,2 cleavages... |
Potassium Feldspar
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| 2 |
 Felsic, silicate, Hardness of 6 cannot be scratched by streak plate. 2 cleavages... |
Plagioclase
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| 3 |
 Felsic Silicate, Hardness of 2.5 i.e scratch with fingernail. Cleavage forms in sheets; light... |
Muscovite
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| 4 |
 Mafic silicate; H-7 cannot be scratched by streak plate, Conchoidal fracture, no cleavage, forms... |
Olivine
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| 5 |
 Mafic Silicate; H-5.5-6 can scratch glass/scratched with masonry nail or knife blade,... |
Pyroxene (Augite)
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| 6 |
 Mafic Silicate H-5.5 can scratch glass/be scratched with masonry nail and knife blade,... |
Amphibole (Hornblende)
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| 7 |
 Mafic Silicate; H-2.5-3 can be scratched with fingernail, 1 excellent cleavage forms sheets,... |
Biotite
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| 8 |
 Felsic; non silicate; non metallic; H-3 can be scratched with a penny, 3 excellent cleavages... |
Calcite
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| 9 |
 Felsic; Non silicate; non metallic' H-3.5 can be scratched with little nail, 3 good cleavages... |
Dolomite
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| 10 |
 Felsic Non silicate, non metallic, H-2.5: scratched by fingernail; Clear; Tastes like salt.... |
Halite
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| 11 |
 Felsic; Non silicate; non metallic; H-2 Cleavage good but variable between varieties;... |
Gypsum
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| 12 |
 Felsic; Non silicate; non metallic. H-1 |
Talc
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| 13 |
 Fools gold |
Pyrite
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| 14 |
 Metallic H-2.5, good cleavage in 3 directions, silver gray, Very high Sp. Gr. Of 7.5 |
Galena
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| 15 |
 Metallic H-5-6, Color silver to gray to reddish; reddish brown streak |
Hematite
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