Minerals Properties Lab Key (old)

Directions for Mineral Properties Lab

  1. On the margin of a sheet of notebook paper, number from 1 to 20.
  2. Go to each mineral property station and answer the questions found there.

Mineral Properties Lab Key

Luster
  1. metallic
  2. waxy
  3. dull
  1. galena – PbS
  2. chalcedony – SiO2
  3. limonite – FeO(OH) · n H2O
Color
  1. green
  2. yellowish-gold
  3. black
  1. fluorite – CaF2
  2. pyrrhotite – FexS
  3. amphibole – Ca2(Fe,Mg)5Si8O22(OH)2
Streak
  1. black/gray
  2. black/gray
  3. reddish brown
  1. chalcopyrite – CuFeS2
  2. galena – PbS
  3. specular hematite – Fe2O3
Hardness
  1. harder than steel
  2. softer than fingernail
  3. harder than nail / softer than glass
  1. corundum – Al2O3
  2. gypsum – CaSO4 · 2H2O
  3. orthoclase – KAlSi3O8
Heft
  1. light / heavy
  1. gypsum – CaSO4 · 2H2O
  2. magnetite – Fe3O4
Cleavage/Fracture
  1. cleavage
  2. fracture
  3. cleavage
  1. muscovite – KAl2AlSi3O10(OH)2
  2. quartz – SiO2
  3. calcite – CaCO3
Special
  1. magnetic
  2. odor
  1. magnetite – Fe3O4
  2. sulfur – S
Crystal
  1. regular crystalline shape
  2. irregular
  1. quartz – SiO2
  2. malachite – Cu2CO3(OH)2