1 / 16

How to Identify Minerals…

How to Identify Minerals…. Why should we know about minerals?. Diet & Nutrition Calcium, Chlorine , Chromium, Copper, Fluoride, Iodine, Iron, Magnesium, Potassium, Sodium, vitamins Kidney stones, gallstones Water Cars Batteries – MP3 players, iPods, cell phones Electricity Jewelry

anika
Télécharger la présentation

How to Identify Minerals…

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. How to Identify Minerals…

  2. Why should we know about minerals? • Diet & Nutrition • Calcium, Chlorine, Chromium, Copper, Fluoride, Iodine, Iron, Magnesium, Potassium, Sodium, vitamins • Kidney stones, gallstones • Water • Cars • Batteries – MP3 players, iPods, cell phones • Electricity • Jewelry • Fool’s gold

  3. Identifying Minerals • What characteristics would you use to identify or classify different minerals? (3,800 minerals) • 9 classifications/properties (physical & chemical properties)

  4. Color • Easy to observe • Not always a clear way to identify

  5. Streak • Streak: the color of its powder • Colors of minerals may vary but streak does not

  6. Luster • Luster: how much light is reflected from a mineral’s surface

  7. Density • Density: how much mass there is in a given space • D = m/v or water displacement

  8. Hardness • Hardness: determined by a scratch test • A mineral can scratch any material softer than itself • But can be scratched by any mineral that is harder • Mohs hardness scale

  9. Mohs Hardness Scale

  10. Crystal Systems • Crystal system: the structure of how the mineral’s atoms form • Ex: cubic, hexagonal, rhombic

  11. Cleavage • Cleavage: when a mineral splits along a flat surface • Ex: Mica

  12. Fracture • Fracture: when a mineral breaks apart in an irregular way

  13. Special Properties • Some minerals are identified by special physical/chemical properties.

  14. Group Identification • Person #1: describe rock to partner using 3-4 properties • Switch

  15. Review • Usually not a clear identifier • Does not break in a flat sheet • Calcite’s powder is always white • Fluorescent • Breaks in flat sheets • Shiny mineral • Cubic shape • Compares how it is scratched/scratches • How much mass takes up a certain volume • Color • Streak • Luster • Density • Hardness • Crystal system • Cleavage • Fracture • Special properties Answers: 1. A 2. C 3. F 4. I 5. H 6. G 7. E 8. B 9. D

More Related