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Minerals. The building blocks of rocks. Atoms, Elements, & Minerals. Atom Smallest component of an element. f. Atoms, Elements, & Minerals. Element substance that cannot be broken down into simpler substances by ordinary means . Atoms, Elements, & Minerals. Compound

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Minerals


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    1. Minerals The building blocks of rocks

    2. Atoms, Elements, & Minerals • Atom • Smallest component of an element f

    3. Atoms, Elements, & Minerals • Element • substance that cannot be broken down into simpler substances by ordinary means

    4. Atoms, Elements, & Minerals • Compound • made up of more than one element • Cannot be separated by physical means • Minerals are compounds NaCl

    5. Atoms, Elements, & Minerals • Mixture • Can be separated by physical means • ALL rocks are MIXTURES of minerals

    6. Atoms, Elements, & Minerals Atoms Elements Minerals Rocks Compounds Mixtures

    7. Minerals Characteristics of Minerals: • Naturally occurring • Solid • Inorganic • Orderly internal arrangement of atoms • Definite chemical composition.

    8. Minerals • How minerals form: 1. Solidification from magma 2. evaporation and precipitation from water

    9. Mineral Properties • Based on the internal arrangement of atoms. Both of these are made entirely of the element Carbon

    10. Mineral Properties 1. Color - • Most easily observed property • Least useful property • The same mineral may have many colors, or different minerals may have the same color

    11. Mineral Properties 1. Color - • Most easily observed property • Least useful property • The same mineral may have many colors Color differences are caused by impurities trapped in the mineral as it formed.

    12. Mineral Properties Page 16 – Earth Science Reference Tables

    13. Mineral Properties 2. Luster – • The way a minerals shines A. Metallic Luster– Looks like a metal

    14. Mineral Properties 2. Luster – • The way a minerals shines B. Nonmetallic Luster– Does not look like a metal

    15. Mineral Properties 3. Hardness – • A minerals resistance to being scratched Glass Plate Hardness = 5.5 6. Feldspar Fingernail = 2.5

    16. Mineral Properties 4. Cleavage/Fracture • Cleavage occurs when minerals break along planes of weak bonds. • Results in smooth, flat surfaces • When a mineral with cleavage is broken, the pieces look similar

    17. Mineral Properties 4. Cleavage/Fracture • Fracture –breakage not on cleavage planes • Like broken glass – no two pieces are the same

    18. Mineral Properties 5. Streak – • The color of a mineral in powdered form • Tested by rubbing mineral on a streak plate.