Non Metallic Luster, Dark Color

1
Good cleavage in 2 directions _at_ 90o dark green to
black , H 6
Pyroxene
Cleavage prominent
Name _____________
Good cleavage in 2 directions _at_ 56o and 124o,
dark green to black or brown, H 6
Amphibole
Harder than glass
Plagioclase Feldspar
Good cleavage in 2 directions _at_ 90o ,gray to
blue-gray, H 6, one face may be striated
Olivine
Small grains olive color, glassy, H 6.5 - 7
Cleavage absent
Red, brown, yellow, glassy, H 7 -7.5, poor or no
cleavage, crystals 12-sided (dodecahedrons)
Non Metallic Luster, Dark Color
Garnet
Quartz
Conchoidal fracture, H 7, glassy
Good cleavage 4 dir, many possible colors, H 4
Fluorite
Cleavage prominent
Mica
Perfect cleavage 1 dir, sheets, lt.brown to
black, H 2 3
Softer than glass
Hematite
Red earthy appearance, red streak, appears H 1.5
Cleavage absent
Yellow brown earthy appearance, yellow brown
streak, already powdered so appears H 1.5
Limonite