1 / 20

Properties Used To identify minerals

Properties Used To identify minerals. Remember ! Rarely is a mineral identified by a single property . Physical Properties Color Streak Luster Hardness. color. Color is the most easily observed mineral property and the least useful! .

billie
Download Presentation

Properties Used 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. Properties Used To identify minerals

  2. Remember! Rarely is a mineral identified by a single property.

  3. Physical Properties • Color • Streak • Luster • Hardness

  4. color Color is the most easily observed mineral property and the least useful!

  5. Color is not a good property to use to identify a mineral? limestone slate Many minerals have the same color.

  6. Color

  7. color Some exceptions to the color rule would be cinnabar, which is always red, and malachite, which is green.

  8. color Many minerals have a similar color.

  9. color Pure quartz is colorless or white, impurities can make the mineral rose, purple or pink!

  10. streak Streak of a mineral is the color of its powder when rubbed on an unglazed white tile.

  11. streak

  12. streak The streak is often not the same color as the mineral. A minerals color may vary, but the streak rarely will!

  13. The property that means the way the light bounces off the mineral? luster

  14. luster Luster refers to the way a mineral shines in reflected light. Notice the difference between these two minerals?

  15. Metallic Non-metallic Luster How minerals reflect light

  16. luster The mineral on the left has a metallic luster, the one on the right, a nonmetallic luster.

  17. luster There are several terms used to describe nonmetallic luster. Examples could be vitreous, like the quartz on the left, or pearly, like the gypsum on the right.

  18. Words that can be used to describe a mineral’s luster? *Glassy *Shiny *Dull *Greasy

  19. Other terms that might be used include greasy, dull, and earthy. Can you tell which of these has an earthy luster and which has a vitreous luster? Vitreous Earthy

  20. Earth Science 2nd, 3rd, 4th Monday, October 4, 2010 + Collected homework assignment from Friday, October 1, 2010 * Read 9.2 {pages 163-169} * Outline section 9.2 + Began class notes regarding “Properties used to Identify Minerals” + Read or reread section 9.2, then answer Critical Thinking questions 1-5 and Application 1-4 on page 171.

More Related