Pregunta | Respuesta |
Image:
Augite (binary/octet-stream)
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augite/pyroxene- key feature: 2 directions of cleavage nearly 90 degrees |
augite/pyroxene- key feature: 2 directions of cleavage nearly 90 degrees | |
biotite - key feature: peels into thin flakes, darker than muscovite | |
biotite - key feature: peels into thin flakes, darker than muscovite | |
calcite - key feature: reacts with acid | |
calcite - key feature: reacts with acid | |
galena - key feature: cubic formations, heavy | |
galena - key feature: cubic formations, heavy | |
garnet | |
garnet | |
graphite - key feature: can scratch with fingernail, writes like pencil lead | |
graphite - key feature: can scratch with fingernail, writes like pencil lead | |
Image:
Gypsum (binary/octet-stream)
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gypsum - key feature: can scratch with fingernail |
gypsum - key feature: can scratch with fingernail | |
Image:
Halite (binary/octet-stream)
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halite - key feature: salty taste, 3- directional cleavage at 90 degrees (cubic) |
halite - key feature: salty taste, 3- directional cleavage at 90 degrees (cubic) | |
hematite - key feature: red streak, may be weakly magnetic | |
hematite - key feature: red streak, may be weakly magnetic | |
hornblende/amphibole | |
hornblende/amphibole | |
magnetite - key feature: magnetic | |
magnetite - key feature: magnetic | |
muscovite - key feature: peels into thin flakes, lighter in color than biotite | |
muscovite - key feature: peels into thin flakes, lighter in color than biotite | |
olivine | |
olivine | |
orthoclase (or Potassium Feldspar) | |
orthoclase (or Potassium Feldspar) | |
plagioclase feldspar | |
plagioclase feldspar | |
pyrite | |
pyrite | |
quartz | |
quartz | |
Image:
Talc1 (binary/octet-stream)
|
talc- key feature: soapy feel, softer than fingernail |
Image:
Talc2 (binary/octet-stream)
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talc- key feature: soapy feel, softer than fingernail |
specular hematite | |
specular hematite | |
fluorite- key feature: cleaves into octahedrons | |
fluorite- key feature: cleaves into octahedrons |
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