Rock identification GEOL 1107 lab exam

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39 Terms

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Muscovite

Glassy Luster, Clear/white colour, Colourless/white streak, 1 cleavage

<p>Glassy Luster, Clear/white colour, Colourless/white streak, 1 cleavage</p>
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Biotite

1 cleavage, foil texture, black or brown streak/colour, vitreous texture

<p>1 cleavage, foil texture, black or brown streak/colour, vitreous texture</p>
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Hornblende

Colour black/dark green, the streak is black, 5-6, vitreous luster

<p>Colour black/dark green, the streak is black, 5-6, vitreous luster</p>
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Pyroxene

green/black, 2 cleavages less than 90, Vitreous luster

<p>green/black, 2 cleavages less than 90, Vitreous luster</p>
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Olivine

greenish/yellow sugarlike, 1 poor cleavage, green streak

<p>greenish/yellow sugarlike, 1 poor cleavage, green streak</p>
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potassium Feldspar

salmony/peachy, perthitic texture, 2 cleavage at 90

<p> salmony/peachy, perthitic texture, 2 cleavage at 90</p>
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plagloclase feldspar

striations/ reflective, nice cleavage, dark/white/gray, 2 cleavages

<p>striations/ reflective, nice cleavage, dark/white/gray, 2 cleavages</p>
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Quartz

crystal habit, 7 hardness, and commonly transparent or translucent. White/colourless streak

<p>crystal habit, 7 hardness, and commonly transparent or translucent. White/colourless streak</p><p></p>
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microcrystalline quartz

conchodial fracture, burnt odour, non metallic luster, grey/white spots

<p>conchodial fracture, burnt odour, non metallic luster, grey/white spots</p>
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microcrystalline quartz

conchodial fracture, non metallic luster, orange/yellow

<p>conchodial fracture, non metallic luster, orange/yellow</p>
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Calcite

reactive w Hcl, translucent, non metallic luster

<p>reactive w Hcl, translucent, non metallic luster</p>
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dolomite

whiteish/pink, 3.5-4, reacts HCL

<p>whiteish/pink, 3.5-4, reacts HCL</p>
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calcite

looks like sponge coliformy

<p>looks like sponge coliformy</p>
14
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Hematite

redish/brown, earthy luster, 5.5-6.5

<p>redish/brown, earthy luster, 5.5-6.5</p>
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hematite

shimmery/grey, woodlike texture, sub metallic

<p>shimmery/grey, woodlike texture, sub metallic</p>
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Galena

dense, metallic luster, greyish, 90 degree cleavage

<p>dense, metallic luster, greyish, 90 degree cleavage</p>
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Pyrite

metallic luster, golden yellow color, 6-6.5 hardness

<p>metallic luster, golden yellow color, 6-6.5 hardness</p>
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garnet

no cleavage, usually white, dark red streak, but vary

<p>no cleavage, usually white, dark red streak, but vary</p>
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Garnet

no cleavage, color reddish/brown colour, white streak, vitreous streak

<p>no cleavage, color reddish/brown colour, white streak, vitreous streak</p>
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Quartz (amethyst)

nice crystal habit, no cleavage, vary in color

<p>nice crystal habit, no cleavage, vary in color</p>
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chlorite

low density, green/blue/black, no cleavage, greenish streak

<p>low density, green/blue/black, no cleavage, greenish streak</p>
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epidote

greenish, one good cleavage, earthy, hardness>6.5

<p>greenish, one good cleavage, earthy, hardness&gt;6.5</p>
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kyanite

foliate texture, translucent, one cleavage, hardness> 6.5

<p>foliate texture, translucent, one cleavage, hardness&gt; 6.5</p>
24
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serpentine

blackish/green/yellow, 2.5-4 hardness, waxy luster.

<p>blackish/green/yellow, 2.5-4 hardness, waxy luster.</p>
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staurolite

Reddish/brown, colourless streak, 7-7.5 hardness, earthy luster

<p>Reddish/brown, colourless streak, 7-7.5 hardness, earthy luster</p>
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Talc

foliate texture, pearly, white streak, hardness<3.5

<p>foliate texture, pearly, white streak, hardness&lt;3.5</p>
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magnetite

grey streak, hardness<6.5, 5.5, magnetic

<p>grey streak, hardness&lt;6.5, 5.5, magnetic</p>
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limonite

light brown streak, brittle,loosely held together, color reddish

<p>light brown streak, brittle,loosely held together, color reddish</p>
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spharalite

translucent, metallic luster, brown/black, brown streak, hardness>6.5

<p>translucent, metallic luster, brown/black, brown streak, hardness&gt;6.5</p>
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Cinnabar

drusy texture

<p>drusy texture</p>
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malachite

green streak, hardness<3.5,non metallic luster, earthy

<p>green streak, hardness&lt;3.5,non metallic luster, earthy</p>
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azurite

light blue streak, hardness<3.5, sub metallic luster, uneven fracture

<p>light blue streak, hardness&lt;3.5, sub metallic luster, uneven fracture</p>
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Bornite

dense, blue shimmer, black streak, hardness<3.5

<p>dense, blue shimmer, black streak, hardness&lt;3.5</p>
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Chalcopyrite

metallic luster (shimmery gold), black streak, hardness<3.5

<p>metallic luster (shimmery gold), black streak, hardness&lt;3.5</p>
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molybdenite

silver metallic luster, grey streak, hardness<3.5

<p>silver metallic luster, grey streak, hardness&lt;3.5</p>
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Bauxite

orangish/red, 1-3 hardness, no cleavage, earthy luster

<p>orangish/red, 1-3 hardness, no cleavage, earthy luster</p>
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pyrrhotite

sub-metallic, bronzey, dense, black strak, hardness<6.5

<p>sub-metallic, bronzey, dense, black strak, hardness&lt;6.5</p>
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halite

glass-like, hardness of 2.5, white streak, low density

<p>glass-like, hardness of 2.5, white streak, low density</p>
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Graphite

Feels greasy, can write on laper with, metallic luster looks grey, black streak

<p>Feels greasy, can write on laper with, metallic luster looks grey, black streak</p>

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