1 / 10

From The Town Of Bedrock, Its a Place Right Out Of History

From The Town Of Bedrock, Its a Place Right Out Of History. A mineral defined. the solid portion of the earth is composed of rocks rocks are composed of minerals All minerals are defined by the following : Naturally occurring: mother nature makes minerals…not us!

clarke
Download Presentation

From The Town Of Bedrock, Its a Place Right Out Of History

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. From The Town Of Bedrock, Its a Place Right Out Of History

  2. A mineral defined • the solid portion of the earth is composed of rocks • rocks are composed of minerals • All minerals are defined by the following: • Naturally occurring:mother nature makes minerals…not us! • Inorganic:made of things that are not living and never will be living! • Solid: hard and breakable • Homogeneous: the same throughout • Definite chemical composition:unique combination of elements • Crystalline structure:repeating pattern of atoms that creates crystals

  3. A mineral identified • There are 6 traits you can test to help you correctly identify a mineral sample • Color • Hardness • Streak • Cleavage/Fracture • Luster • Unique characteristics

  4. Color • Color is okay to look at initially, but you can not base your decision only on that one trait • Why? Trace elements can vary the external color. • If we only looked at color, we would not identify it correctly. These are both diamonds

  5. Can You Scratch It? • When you try to scratch a mineral, you are testing its hardness • If it can be scratched, then it is softer than the object you used to scratch it • If it cannot be scratched, then it is harder than the object you used to scratch it • Common minerals and their hardness are ranked on Moh’s Hardness Scale, listed from the softest to the hardest

  6. Field hardness chartpage 106

  7. We Have a Streaker!! • The streak of a mineral is the mineral in its powdered form • Minerals will only have a streak if they are softer than the streak plate (which has a hardness of 7) • If the mineral has a metal in its chemical formula, it will usually leave a streak • The streak color will not always be the same color as the mineral…so don’t assume!

  8. I Need a Break!!! • Cleavage and fracture are two terms used to describe how a mineral breaks • Cleavagemeans it breaks with smooth, flat surfaces • Fracturemeans the mineral breaks along jagged surfaces

  9. Oh, How it Shines! • How a mineral shines describes its luster • If it shines like a metal, it has metallic luster • If it does not shine like a metal, it has nonmetallic luster • Dull • Glassy • Earthy • Pearly • Waxy

  10. Unique characteristics • Magnetism (magnetite) • Double refraction, double image (calcite) • Fizzes when acid is placed on it (calcite) • Fluorescence (glows under a black light) • Olfactory (sulfur) smell • Specific gravity: THE BEST TEST TO HELP YOU IDENTIFY A MINERAL!

More Related