Geology 300: Physical Geology
Geology 301: Physical Geology
Lab
Geology 305: Earth Science
Geology 306: Earth Science lab
Samples: Minerals, Sedimentary, Igneous, Metamorphic
Instructor: Arthur Reed, P.G.
Mineral
Samples for Geol 301 Lab Activity 3.4
All
samples are approximately 1 3 in size
SG = Specific Gravity
NOTE: ALWAYS CLICK ON THE SAMPLE NUMBER UNDER THE PHOTO TO GET
THE BEST/CORRECT VIEW OF THE MINERAL
Hardness: 3
Hardness: 3.4 - 4
SG = 4.1 4.3
May fizz with HCl when in powdered (scratched) form
Cleavage excellent (although not apparent in this photo)
Hardness: 3.5 - 4
SG = 2.8 2.9
Hardness: 2.5
SG = 7.4 7.6
Cleavage good (although not apparent in this photo)
Hardness: 2
SG = 2.3
This mineral comes in all colors
Hardness: 7
SG = 2.6 2.7
May feel greasy
Hardness: 1
SG = 2.7 2.8
Often is cubic form
Taste Test: tastes salty
Hardness: 2.5
SG = 2.1 2.6
May have slight attraction to a magnet
Hardness: 1 - 6
SG = 4.9 5.3
Hardness: 4 - 7
SG = 3.6 3.7
Hardness: 7 7.5
SG = 3.0 3.2
Cleavage excellent (although not apparent in this photo)
Hardness: 2 2.5
SG = 2 - 3
Hardness: 7
SG = 2.6 2.7
Hardness: 2.5 - 3
SG = 2.7 3.1
Cleavage good (although not apparent in this photo)
Hardness: 5.5 - 6
SG = 3 3.3
Hardness: 9
SG = 3.9 4.1
Cleavage 90° in two directions (although not apparent in this photo)
Hardness: 6
SG = 2.6 2.8
Cleavage excellent in two direction at nearly 90° (although not apparent in this photo)
Hardness: 6
SG = 2.5 2.6
May be magnetic
Hardness: 6 6.5
SG = 5 5.2
Crystals are often in cubic form
Hardness: 6 6.5
SG = 4.9 5.2
May feel greasy
Hardness: 1
SG = 2 2.3
Crystal shape may also be cubic
Hardness: 4
SG = 3 3.3
stinky, often found around volcanic vents
Hardness: 1.5 2.5
SG = 2.1
Often greenish color
Hardness: 7
SG = 3.3 3.4
Rhombic dodecahedron
Hardness: 7
SG = 3.5 4.3
Hardness: 2.5 - 3
SG = 8.8 9.0
Fracture may be conchoidal
Hardness: 5
SG = 3.1 3.4
May be weakly magnetic
Hardness: 5 5.5
SG = 3.3 4.3
May be weakly attracted to a magnet
Hardness: 5.5 - 6
SG = 4.5 4.8
Look closely at the shape of some of the mineral grains
Hardness: 5.5 - 6
SG = 3.1
Note the shape of the mineral grains
Also commonly dark green
Hardness: 6 - 7
SG = 3.3 3.5
Fizzes in HCl
Hardness: 3.5 - 4
SG = 3.6 - 4