Term
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Definition
Galena
WI state Mineral - primary ore of lead
Metallic Luster - silver color - grey streak
Sulfide - PbS
Cleavage |
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Term
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Definition
Quartz
Silicate - SiO2
Non-metallic, fracture, colorless streak
Many colors - rose, smoky, amethyst
hardness of 7
Abundant and widely distributed in the Earth's crust |
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Term
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Definition
Pyrite
Sulfide Group - FeS2
"fool's gold" , brassy gold color
Metallic luster, black/brown streak |
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Term
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Definition
Magnetite
Oxide Group - Fe3O4
Mined as an ore of iron
attracted to a magnet
Metallic Luster , black/grey color, black streak |
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Term
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Definition
Potassic Feldspar
Silicate Group - KAlSi3O8
Most abundant family of minerals
Salmon color, white streak |
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Term
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Definition
Gypsum
Sulfate Group - CaSo4 2H2O (calcium sulfate dihydrate)
White , white streak
Hardness of 2 , very soft
Used in drywall, fertilizer. plaster |
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Term
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Definition
Biotite Mica
Silicate
Cleavage - breaks into thin sheets
Black with a white/grey streak |
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Term
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Definition
Specular Hematite
Oxide Group - Fe2O3
Sparkly Black, brown streak |
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Term
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Definition
Plagioclase Feldspar
Silicate Group -NaAlSi3O8
White with grey striations, white streak |
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Term
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Definition
Copper
Native Element Group - Cu
metallic - good conductor of electricity |
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Term
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Definition
Calcite
Carbonate Group - CaCO3
reacts with HCl
White, white streak
hardness of 3-3.5
Makes limestone and marble |
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Term
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Definition
Muscovite Mica
Silicate Group
Cleavage - breaks into thin sheets
Tan color, colorless streak
used in cosmetics, electronics, construction, paints |
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Term
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Definition
Dolomite
Carbonate Group -CaMg(CO3)2
Reacts with HCl
Grey with pink crystals, white streak
Important in Niagra Escarpment in dolostone and dolomitic limestone |
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Term
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Definition
Hematite
Oxide Group - Fe2O3
Red color, brown streak
Used in pigments |
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Term
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Definition
Halite
Halide Group - NaCl
Rock salt
Colorless
Cleavage, hardness of 2-2.5 |
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Term
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Definition
Graphite
Native Element Group - C (allotrope of carbon)
Metallic - greasy feel - hardness of 2
Grey with a black streak |
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Term
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Definition
Flourite
Halide Group - CaF2
Sea green or purple color, white streak
Will fluoresce
used in toothpaste to prevent tooth decay |
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