How can you identify minerals? by Emily Helton https://padlet.com/eghelton/l0v1mm0t1tfk Sorry we didn't really do this in class. en-us 2020-04-03 23:29:04 UTC 2026-02-03 01:42:28 UTC hello@padlet.com cK-12 eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492019929 They have some good resources on mineral properties. ]]> 2020-04-03 23:30:12 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492019929 Cleavage eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492032137 When a mineral breaks in clean planes. Not all minerals have cleavage.]]> 2020-04-03 23:55:21 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492032137 Fracture eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492040646 If a mineral doesn't have cleavage it has fracture. They break, but not cleanly.]]> 2020-04-04 00:15:41 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492040646 Hardness eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492041583 You can use a variety of tools to assess hardness: fingernails, regular nails, glass, a penny, and other minerals. ]]> 2020-04-04 00:18:04 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492041583 Interactive Gizmo eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492051253 You only have 5 minutes to identify 26 minerals, using the properties of: hardness, crystal structure, luster, acid reaction, and density. I only got three :( ]]> 2020-04-04 00:42:26 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492051253 Density eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492052957 Remember when you measured rocks for density? Minerals have characteristic density as well! ]]> 2020-04-04 00:46:18 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492052957 Magnetism eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492055611 If your mineral is magnetic... it's probably magnetite. (There are others, too.) ]]> 2020-04-04 00:51:07 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492055611 Luster eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492056986 Luster is how a mineral reflects light. Some minerals don't (dull, earthy luster), some are super shiny (metallic, glassy). ]]> 2020-04-04 00:54:29 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492056986 Streak eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492059170 If a mineral is softer than a ceramic plate, you can drag it across, creating a colored powder. This powder doesn't always match the color of the mineral!! ]]> 2020-04-04 00:59:48 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492059170 Color eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492059866 What minerals are these? Did you guess that they're all the same mineral? Did you guess that they're diamond? Because they are. Color is one of the most useless properties when it comes to identifying minerals. ]]> 2020-04-04 01:01:33 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492059866 Acid Test eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492065285 Carbonate minerals (like calcite) react with acid, forming bubbles. ]]> 2020-04-04 01:14:35 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492065285 Resources eghelton https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492065897 cK-12 Foundation. Mineral Identification. https://www.ck12.org/earth-science/Mineral-Identification/
Gizmos. https://www.explorelearning.com/index.cfm?method=cResource.dspDetail&ResourceID=640
S.A. Nelson, Tulane University. https://www.tulane.edu/~sanelson/eens211/physprop.htm]]> 2020-04-04 01:16:14 UTC https://padlet.com/eghelton/l0v1mm0t1tfk/wish/492065897