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Mineral ID

Mineral ID. Definition. Naturally occurring Solid Inorganic Crystalline form Definite chemical composition. Mineral Properties. Luster Hardness Streak Color Crystal Cleavage/Fracture Other. Luster - Metallic. Luster - Nonmetallic. Hardness Test.

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Mineral ID

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  1. Mineral ID

  2. Definition • Naturally occurring • Solid • Inorganic • Crystalline form • Definite chemical composition

  3. Mineral Properties • Luster • Hardness • Streak • Color • Crystal • Cleavage/Fracture • Other

  4. Luster - Metallic

  5. Luster - Nonmetallic

  6. Hardness Test Scratch a mineral with either another mineral or field test materials. The harder mineral will leave a mark or cut into the softer mineral. • Field Test • Try to scratch with • Fingernail - if so, 2.5 • if not, • Try to scratch with • Copper Penny – if so, 3 • if not, • Try to scratch with • Steel Nail – if so, 5 • if not, • Try to scratch with • Glass Plate – if so, 5.5 • if not, • Try to scratch with • Streak Plate – if so, 7.5 • if not, > 7.5

  7. Very soft minerals

  8. Very hard minerals

  9. Streak Rub the mineral across the porcelain plate. The color left behind is the streak. Nonmetallic minerals and those that have a hardness greater than the streak plate will leave either white or no streak.

  10. Cleavage vs. Fracture

  11. Fracture Fracture

  12. Crystal vs Fracture - Quartz

  13. Crystal vs Cleavage - Galena

  14. Twinning - Staurolite  Back

  15. Color - Quartz

  16. Color - Calcite

  17. Other • Crystal (galena) (pyrite) (fluorite) (quartz) Twinning(staurolite) • Fluorescense (fluorite) • HCl Acid Reaction (calcite) • Heft (galena) • Magnetism (magnetite) • Plasticity (mica) • Smell (sulfur) • Sound: actually a reaction to heat expansion (sulfur) • Taste (halite) • Touch (talc) (graphite) (kaolonite)

  18. Crystal Shape - Quartz

  19. Crystal Shape - Pyrite

  20. Crystal Shape - Fluorite

  21. Crystal Shape - Wavellite

  22. FluorescentMineral Gallery

  23. HCl reaction

  24. Heft

  25. Magnetism

  26. Plasticity

  27. Smell

  28. Sound - Sulfur

  29. Touch – feel dusty, slick and soapy

  30. Diamond

  31. Earth Science LabID of an Unknown MineralID Key online

  32. Rockhounding ArkansasThe Science Spot Kid Zone

  33. Minerals Make Up Rocks

  34. Rocks are made from minerals!

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