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2002 Minerals Education Workshop Sponsored by: Indiana Department of Natural Resources – Division of Reclamation November 1-2, 2002
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Minerals www.themineralgallery.com
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Minerals A mineral is a naturally occurring, inorganic solid that has a specific internal structure, a definite chemical composition and specific physical properties. www.themineralgallery.com
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Minerals A mineral is a naturally occurring, inorganic solid that has a specific internal structure, a definite chemical composition and specific physical properties. Must occur naturally in nature Not man-made www.intheloop.com
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Minerals A mineral is a naturally occurring, inorganic solid that has a specific internal structure, a definite chemical composition and specific physical properties. Does not have a “living” or biological origin What about coal?
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Pennsylvanian-age swamp Coal www.geology.ohio-state.edu
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Minerals A mineral is a naturally occurring, inorganic solid that has a specific internal structure, a definite chemical composition and specific physical properties. (Gold) into a specific crystalline structure Definite arrangement of atoms Web.jjay.cuny.edu
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crystal collection of unit cells molecule atoms Indiana Geological Survey/After Mineralogy, 1998, Dexter Perkins mineral unit cell
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GraphiteDiamond The arrangement of atoms is important. The element carbon (C) can form diamond -- a hard, clear mineral -- or graphite -- a soft, gray mineral -- depending on the crystal structure. Hard, bright, gemSoft, gray, lubricant Indiana Geological Survey
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(www.discovery.com)www.discovery.com
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(www.discovery.com)www.discovery.com
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Minerals A mineral is a naturally occurring, inorganic solid that has a specific internal structure, a definite chemical composition and specific physical properties. CuAl 6 (PO 4 ) 4 (OH) 8 *5H 2 OSiO 2 Quartz R.Weller/Cochise College Turquoise Can be expressed with a specific chemical formula
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Minerals A mineral is a naturally occurring, inorganic solid that has a specific internal structure, a definite chemical composition and specific physical properties. Minerals of the same type always have the same hardness, specific gravity, cleavage, streak, etc.
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Physical Characteristics of Minerals 1) Smell: scratch & sniff 2) Luster: reflection of light off a clean surface A.Metallic – looks like a metal B.Nonmetallic a.Vitreous (glassy) b.Resinous c.Greasy d.Earthy/chalky e.Pearly R.Weller/Cochise College
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Physical Characteristics of Minerals Physical Characteristics of Minerals (continued) 3) Magnetism: is the mineral magnetic? 4)Color: use with caution! 5)Streak: color of the powdered mineral on an unglazed, porcelain plate A.Metallic minerals generally have colored (dark) streaks B.Nonmetallic minerals generally have white/ colorless or very pale-colored streaks R.Weller/Cochise College
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Physical Characteristics of Minerals Physical Characteristics of Minerals (continued) 6) Hardness: How resistant is the mineral to scratching? A.Mohs Hardness Scale 1.Talc 2.Gypsum 3.Calcite 4.Fluorite 5.Apatite 6.Orthoclase 7.Quartz 8.Topaz 9.Corundum (ruby, sapphire) 10.Diamond www.egem.comDiamond R.Weller/Cochise CollegeTalc
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Physical Characteristics of Minerals (continued) a.Fingernail B.Common hardness test: b.Copper penny / plate c.Steel nail d.Glass plate 2.5 3.0 5.0 5.5
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Physical Characteristics of Minerals (continued) 7) Cleavage: tendency of some minerals to break along planes of weakness Cleavage in (1) direction Cleavage in (2) directions at right angles Cleavage in (2) directions not at right angles Cleavage in (3) directions at right angles Cleavage in (3) directions not at right angles Cleavage in (4) directions Cleavage in (6) directions
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Physical Characteristics of Minerals (continued) Not all minerals have cleavage! **Caution – although the description may state the mineral has cleavage, the mineral in your set may not show it!
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Physical Characteristics of Minerals (continued) 8) Effervescent (fizz rate): reaction of the mineral to a weak acid To determine if calcite (CaCO 3 ) is present
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Physical Characteristics of Minerals (continued) 9) Specific gravity: ratio of the weight of a mineral fragment & the weight of an equal amount of water
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The calcite crystal pictured here is from Indiana. The journal Rocks and Minerals featured Indiana minerals in one 1986 issue. Indiana Geological Survey
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Minerals of Indiana Calcite CaCO 3 Indiana Geological Survey Calcite Fluorite
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Quartz SiO 2 Indiana Geological Survey R.Weller/Cochise College Minerals of Indiana Indiana Geological Survey
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Limonite FeO (OH) H 2 O Fluorite CaF 2 Minerals of Indiana R.Weller/Cochise College
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Gypsum CaSO 4 *2H 2 O Minerals of Indiana Sphalerite ZnS R.Weller/Cochise College
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Siderite FeCO 3 Dolomite CaMg(CO 3 ) 2 Minerals of Indiana Indiana Geological Survey
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Minerals of Indiana Barite BaSO 4 Pyrite FeS 2 Indiana Geological Survey
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Small crystals of resistant, so-called “heavy minerals,” including gold (Au), can be concentrated from stream sediments. These minerals were brought to Indiana by glaciers. Indiana Geological Survey
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INDUSTRIAL MINERALS AROUND THE HOUSE Hair Cream Counter tops Household Cleaners Caulking Jewelry Kitty Litter Fiberglass Roofing Potting Soil Paint ITEM MINERALS NEEDED TO PRODUCE THEM Calcium carbonate Titanium dioxide, calcium carbonate, aluminum hydrate Silica, pumice, diatomite, feldspar, limestone Calcium carbonate, gypsum Precious and semiprecious stones Attapulgite, montmorillonite, zeolites, diatomite, pumice, volcanic ash Silica, borates, limestone, soda ash, feldspar Vermiculite, perlite, gypsum, zeolites, peat Titanium dioxide, kaolin clays, calcium carbonate, mica, talc, silica Indiana Geological Survey
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Carpet Glass/Ceramics Vinyl Flooring Glossy Paper Cake/Bread Plant Fertilizers Toothpaste Lipstick Baby Powder Calcium carbonate Silica sand, limestone, talc, lithium, borates, soda ash, feldspar Calcium carbonate, clay, wollastonite Kaolin clay, limestone, sodium sulfate, lime, soda ash, titanium dioxide Gypsum, phosphates Potash, phosphates, nitrogen, sulfur Calcium carbonate, sodium carbonate, fluorine Calcium carbonate, talc Talc ITEM MINERALS NEEDED TO PRODUCE THEM Indiana Geological Survey INDUSTRIAL MINERALS AROUND THE HOUSE
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Indiana Geological Survey/After “Out of the Rock” by the National Energy Foundation
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Indiana Geological Survey
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Wow !!!
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Mineral Exercise
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www.rocksandminerals.com http://nesen.unl.edu www.cuug.ab.ca:8001/~johnstos/geosci.html www.bced.gov.bc.ca/irp/sciencek7/apf.htm www.enchantedLearning.com http://volcano.und.nodak.edu/vwdocs/vwlessons/lessons/lesson. html http://fga.freac.fsu.edu/misc/rock.htm Suggested Websites http://geollab.jmu.edu/Fichter/metaRx/
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Evaluations
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