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33 terms

Minerals/Rocks

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Talc
MINERAL; Nonmetallic luster, doesn't scratch a glass plate, Soapy feel, pearly luster, scratched by a fingernail, penny, Color: green-grey-white-silver
Satinspar
MINERAL; AKA GYPSUM; Fibrous habit, doesn't scratch the glass plate, can be scratched by a penny and a fingernail, translucent, silky luster,
Selenite
MINERAL; AKA GYPSUM; No actual color, color comes from tinted matter; transparent, glass like luster, doesn't scratch a glass plate, can be scratched by a penny, and a fingernail
Alabaster
MINERAL; AKA GYPSUM; doesn't scratch a glass plate, can be scratched by penny and a fingernail, looks like make up for really pale people :)
Muscovite
MINERAL; Clear Sheets, non metallic, can't scratch a glass plate, can be scratched by a penny and a fingernail, white streak, transparent-translucent
Biotite
MINERAL; Doesn't scratch a glass plate, can be scratched by a penny and fingernail, black sheets,
Calcite
MINERAL; doesn't scratch a glass plate, *fizzes with HCl, can be scratched by a penny but not a fingernail, rhombic cleavage
Halite
MINERAL; Cubic cleavage, salty taste, doesn't scratch a glass plate, scratched by a penny but not by a finger
Barite
MINERAL; Can't scratch a glass plate, can be scratched by a penny but can't be scratched by a fingernail, ice blue, heavy for its size,
Sphalerite
MINERAL; Can't scratch a glass plate, can be scratched by a penny but not a fingernail, light yellow streak, sulfurous odor
Quartz
MINERAL; conchoidal fracture, can scratch a glass plate, no cleavage, looks like jewelry
Garnet
MINERAL; Non-metallic, scratches a glass plate, no cleavage, dark red or yellow-green crystals, glass like luster
Olivine
MINERAL; Non-metallic, scratches a glass plate, no cleavage, granular habit, green color
Orthoclase
MINERAL; AKA FELDSPAR Non-metallic, scratches a glass plate, pink-white-gray, no striations, right angle fracture
Plagioclase
MINERAL; AKA FELDSPAR, Non-metallic, scratches a glass plate, cleavage, white grey or black; striations
Pyroxene
MINERAL; AKA FELDSPAR, Non-metallic, scratches a glass plate, 2 cleavages near 90 degrees, green-black
Amphibole
MINERAL; Non-metallic, scratches a glass plate, 2 cleavages 124 degrees by 56 degrees
Hematite
MINERAL; can be non metallic and metallic, red-brown streak, can't scratch a glass plate and can't be scratched by a penny
Pyrite
MINERAL; Fools gold, metallic, black streak, golden
Galena
MINERAL; Metallic, black streak, cubic cleavage
Magnetite
MINERAL; Metallic, black streak, magnetic
Pumice
IGENOUS; Pumiceous texture, volcanic origin, felsic composition (light color)
Scoria
IGNEOUS; Scoriaceous texture, volcanic origin, mafic composition (Dark colored)
Obsidian
IGNEOUS; Glassy texture, Volcanic origin, Felsic and intermediate composition (salt and pepper to dark colored)
Porphyritic Rhyolite
IGNEOUS; Porphyritic Texture, Plutonic and Volcanic origin, Felsic composition (light colored)
Granite
IGNEOUS; Phaneritic texture, plutonic origin, felsic composition (light colored)
Gabbro
Phaneritic texture, plutonic origin, mafic composition (dark colored)
Diorite
IGNEOUS; Phaneritic texture, plutonic origin, intermediate composition (salt and pepper)
Peridotite
IGNEOUS; Phaneritic texture, plutonic origin, ultra mafic composition (dark to green)
Pegmatite
IGNEOUS; Pegmatitic texture, plutonic origin, felsic composition (light colored)
Basalt
IGNEOUS; Aphanitic texture, volcanic origin, mafic composition (dark colored)
Porphyritic Andecite
IGNEOUS; Porphyritic texture, plutonic and volcanic origin, intermediate composition (salt and pepper color)
Porphyritic Basalt
IGNEOUS; Porphyritic texture, plutonic and volcanic origin, mafic composition (dark colored)