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32 Cards in this Set

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Sphalerite

Light or Dark
Dark
Hematite

Light or Dark
Dark
Flourite

Light or Dark
Light
Dolomite

Light or Dark
Light
Calcite

Light or Dark
Light
Halite

Light or Dark
Light
Gypsum

Light or Dark
Light
Sulfur

Light or Dark
Light
Sphalerite

Chemical Formula and Economic Use
ZnS
zinc ore
Hematite

Chemical Formula and Economic Use
Fe2O3
iron ore
Flourite

Chemical Formula and Economic Use
CaF2
hydroflouric acid
Dolomite

Chemical Formula and Economic Use
CaMg(CO3)2
cement
Calcite

Chemical Formula and Economic Use
CaCO3
cement
Halite

Chemical Formula and Economic Use
NaCl
table salt
Gypsum

Chemical Formula and Economic Use
CaSO4-2H2O
plaster
Sulfur

Chemical Formula and Economic Use
S
sulfuric acid
Sphalerite

G and H
G=4
H=3.5
Hematite

G and H
G=not given
H=1.5
Flourite

G and H
G=3
H=4
Dolomite

G and H
G=2.9
H=3.5-4
Calcite

G and H
G=2.7
H=3
Halite

G and H
G=2
H=2-2.5
Gypsum

G and H
G=2.3
H=2
Sulfur

G and H
G=2.1
H=1.5-2.5
Sphalerite

Qualities
excellent cleavage
yellow streak
resinous to metallic luster
yellowish brown
Hematite

Qualities
no cleavage
earthy appearance
red streak
Flourite

Qualities
good cleavage in 4 directions

variable color

may occur as cubic crystals or octahedral cleavage fragments
Dolomite

Qualities
may show rhombohedral cleavage in coarsely crystalline samples

will effervesce in HCl when powdered

often in fine-grained masses
Calcite

Qualities
good rhombohedral cleavage

effervesces in HCl

color varies

vitreous luster

also in fine-grained masses such as limestone
Halite

Qualities
perfect cubic cleavage

colorless to white

soluble in water

salty taste
Gypsum

Qualities
perfect cleavage in one direction

white

occurs as different varieties: Selenite is colorless and transparent, Satin Spar has a fibrous silky luster, Alabaster is pink to white and dull
Sulfur

Qualities
yellow color

resinous luster

burns a blue flame

distinctive color