Term
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Definition
[image]
Colorless or white, many colors
pale or colorless
glassy
7
conchoidal fracture
6 sided prism |
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Term
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Definition
[image]
commonly gray, but ranges from white to dark gray
pale to colorless
pearly to glassy
6
good cleavage in 2 directions at about 90
striations on some cleavage planes, one variety has peacock blue irridescence |
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Term
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Definition
[image]
white, creamy, pink, gray, green, brick red
pale to colorless
pearly to glassy
6
good cleavage in 2 directions - 90
no striations, but does have non-parallel streaks |
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Term
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Definition
[image]
usually colorless, may be a variety of colors
white
glassy
3
3 directions good cleavage
fizzes in HCL |
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Term
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Definition
[image]
gray, white, yellow, blue, purple
white
glassy
2.5
3 perfect at 90
cubic, granular massive
water soluble, tastes salty |
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Term
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Definition
[image]
olive green to grayish green
pale to colorless
glassy
6.5-7
non, conchoidal fracture
usually green but occurs with other dark minerals |
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Term
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Definition
[image]
dark green, brown to black, thin sheets a smoky color
pale to colorless
pearly to glassy
2.5-3
one perfect cleavage direction |
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Term
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Definition
[image]
colorless, white, grey
pale to colorless
pearly to classy
2-3
one perfect cleavage direction |
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Term
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Definition
[image]
dark green to black
pale to colorless
pearly to glassy
5-6
good cleavage in 2 directions at ~ 60, 120
cleavage can appear fiborous |
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Term
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Definition
[image]
dark green to black
pale to colorless
pearly to glassy
5-6
good cleavage in 2 directions at ~ 90
cleavage can appear fiborous
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Term
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Definition
[image]
white, transparent
white
pearly to glassy
2
3 directions good cleavage, ~60 and 90
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Term
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Definition
[image]
red, brown, yellow, white, green, black
white
pearly to glassy
6.5-7.5
none
12 sided crystal |
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Term
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Definition
[image]
pale brass yellow
greenish black
metallic
6-6.5
poor, conchoidal fracture
typically cubic
Fool's Gold |
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Term
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Definition
[image]
red, brown, silver, gray
light to blood red
earthy to metallic
5.5-6.5
none
always has red streak |
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Term
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Definition
[image]
dark gray to black
black
earthy but can be metallic or a combo
5-6
none
Magnetic and Heavy |
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