Geology Minerals

28 cards

Images And Descriptions Of 28 Basic Minerals.


 
  
Created Oct 3, 2010
by
chelsasaurusrex

 

 
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1
Hornblende
 
Black to green, 2-D not at right angles (do not confuse with augite)
2
Kaolinite
 
looks like chalk, no HCI reaction
3
Biotite
 
Black, elastic, 1-D, perfect cleavage
4
Chlorite
 
greenish, flexible, 1-D (look for small flakes)
5
Halite
 
transparent, soft, 3-D perfect (cubic)
6
Flourite
 
soft, 4-D
7
Galena
 
Metallic, hi s.g., 3-D perfect  (cubic)
8
Muscovite
 
colorless, silvery, elastic, 1-D perfect cleavage
9
Chalcopyrite
 
metallic, yellowish, soft, no cubes
10
Sphalerite
 
6-D, yellowish where damaged, resinous
11
Quartz
 
transparent, translucent, hard, no cleavage
12
Augite
 
green to black, 2-D at right angles
13
Olivine
 
green and glassy aggregates, no cleavage
14
Pyrite
 
metallic, yellowish, hard
15
Limonite
 
earthy, yellowish-brown to orange streak is diagnostic
16
Hematite
 
red-brown streak, variety of habitats and hardness
17
Plagioclase
 
striations, 2-D at right angles
18
Orthoclase
 
no striations, 2-D at right angles
19
Talc
 
feels greasy, soapy, very soft 1-D
20
Calcite
 
3-D rhombohedral, HCI reaction
21
Gypsum
 
Very soft, 3-D cleagave
22
Garnet
 
spherical faceted crystals, no cleavage, variety of colors
23
Magnetite
 
metallic, magnetic
24
Corundum
 
barrel-shaped hexagonal habit, h=9
25
Dolomite
 
3-D rhombohedral, power reacts with HCI
26
Serpentine
 
green, waxy some samples fibrous
27
Copper
 
soft and malleable, reddish streak/color, hi s.g.
28
Tourmaline
 
Elongate trigonal crystals (cross section), hard, no cleavage


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