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Mineral Properties

Mineral Properties. Physical Properties of Minerals. Color Streak Hardness Cleavage or Fracture Crystalline Structure Magnetism Luster Chemical Composition Specific Gravity (density). Color.

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Mineral Properties

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  1. Mineral Properties

  2. Physical Properties of Minerals • Color • Streak • Hardness • Cleavage or Fracture • Crystalline Structure • Magnetism • Luster • Chemical Composition • Specific Gravity (density)

  3. Color • 18 Of the mineral properties, color is the least accurate for figuring out a mineral’s identity • 23 The purest color of quartz is clear because it has the fewest impurities inside of it

  4. Streak • 13 A mineral’s streak is the powder left behind when a mineral scratches against a streak plate. • 14 The color of the powder that a mineral leaves on a piece of white, unglazed porcelain is called the streak.

  5. Streak

  6. Luster • 20 This characteristic is how light reflects off the mineral.

  7. Luster • 21 Metallic and nonmetallic describes a mineral’s luster

  8. Another Property • Cleavage or Fracture

  9. Cleavage • 15 Cleavage is the tendency of a mineral to break along flat surfaces.

  10. Cleavage • 17 A Diamond breaks evenly and this is called cleavage.

  11. Fracture • 15 Fracture is the tendency of minerals to break into irregular pieces.

  12. Fracture • 16 Quartz breaks unevenly and this is called fracture

  13. Hardness • This physical property is expressed in numbers and shows how the substance withstands being scratched.

  14. 10 Minerals are identified by Hardness is tested by scratching

  15. Hardness • What is Mohs' hardness scale? • 9 A scale from 1 to 10 that measures the hardness of minerals.

  16. Hardness • Which is the softest?

  17. Hardness • Which is the hardest?

  18. 11 What physical properties can be expressed in numbers and shows how that substance withstands being scratched? Hardness

  19. Other Properties • Magnetism • Crystalline Structure • Chemical Composition • Specific Gravity (density)

  20. Do you have all 9? • Color • Streak • Hardness • Cleavage or Fracture • Crystalline Structure • Magnetism • Luster • Chemical Composition • Specific Gravity (density)

  21. 19 The most common classification of minerals is based on chemical composition. • 22 This is considered a special property that applies to only a few minerals. Magnetism.

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