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Mineral ID Quiz
Identifying qualities of various minerals
23
Geology
Undergraduate 2
09/06/2009

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Cards

Term
Quartz
Definition
(SiO2) -No cleavage, 6 sided crystals, 7 hardness
Term
Halite
Definition
(NaCl) -Cubic cleavage, salty taste, transparent
Term
Calcite
Definition
(CaCO3) -Rhombic cleavage, variable color, 3 hardness
Term
Flourite
Definition
(CaF2) -4 direction cleavage, octahedral crystals, 4 hardness
Term
Galena
Definition
(PbS) -Cubic cleavage, metallic luster, 7.6 density
Term
Gypsum
Definition
(CaSO4*2H20) -2 hardness, 1-2 direction cleavage, fibrous
Term
Biotite
Definition
(complex silicate) -sheets, grey streak, pearly luster
Term
Muscovite
Definition
(complex silicate) -cleaves in 1 direction, 2-3 hardness, flexible
Term
Potassium Feldspar
Definition
(complex silicate) -Cleavage in 2 90* angles, hardness 6-6.5, light pearly luster
Term
Amphibole
Definition
(complex silicate) -cleavage at 60* and 120*, needles, dark color
Term
Garnet
Definition
(silicate) -12 sided crystals, glassy luster, 7-7.5 hardness
Term
Olivine
Definition
(silicate)no cleavage, green-yellow color, transparent
Term
Pyrite
Definition
(FeS2) -metallic luster, dark streak, cubic crystals
Term
Hematite
Definition
(Fe2O3) -Red Streak, steel grey color with metallic luster, uneven fracture
Term
Magnetite
Definition
(Fe3O4) -metallic luster, magnetic, 8-sided crystals
Term
Talc
Definition
(sheet silicate) -Feels soapy, pearly in luster/color, 1 hardness
Term
Plagioclase Feldspar (light)
Definition
(silicate) -Striations, contains sodium, cleavage in 2 directions at 90*
Term
Plagioclase Feldspar (dark)
Definition
(silicate) -Striations, contains calcium, cleavage in 2 directions at 90*
Term
Pyroxene
Definition
(silicate) dark color, 8 sided crystals, 2 90* cleavage
Term
Graphite
Definition
(C) -1 hardness, metallic greasy luster, marks paper
Term
Chlorite
Definition
(sheet silicate) -Green color, 1 cleavage direction, 2-2.5 hardness
Term
Limonite
Definition
(Fe2O3*H2O) -yellow streak, yellow-dark brown color, 1.5 hardness
Term
Sphalerite
Definition
(ZnS) -Obvious sulphuric smell, yellow streak, 6 direction cleavage
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