Stuck in someone else's frames? break free!

HomeScience HomeGeology Home
Animals
Astronomy

Animals HomeAstronomy HomeAtoms HomeEcology HomeLiquids HomeMeteorology HomeMicroorganisms HomeOceanography HomePlants HomeSolids Home

MORE ABOUT COLOR STREAKS

Now we're going to find out more about the streak test. Rub a sample of pyrite or chalcopyrite ("chall-co-PIE-rite")across a piece of unglazed porcelain tile.

The greenish-black streak is from the mineral in the rock. The color of the streak made by mineral is often different from color of the mineral in the rock.

Rub other rocks against the tile. Use the Color Sorting Key for Rocks, which lists the external coloring and the mineral streak made by some common minerals, to identify the minerals in the rocks.

Compare the color differences between the rock colors and the streaks made by minerals.

(This writer has come to believe that brilliant geologists learn what kinds of minerals make which streak-colors, so they can tell what kind of mineral even though the streak - color is not the same as the color of the mineral in the rock.)

You will begin to understand that a color streak is useful in the identification of some minerals but that a white streak is not.

 
Contact Spike
Any problems with this page? Send URL to webmaster.  Thank you!
 
 
Add to Favorites
 
 
Search this site powered by FreeFind
 
 
 

Send this page to a friend


Back to Spike's & Jamie's Recipe Collection

 

 

 

 

Sign Guestbook    View Guestbook

 

We publish two newsletters a couple of times a month. To subscribe, send a blank email to the appropriate email address.  Topica will send you a message asking if you really intended to subscribe - just click reply - that's it!

Free Recipe Collection Newsletter:
freerecipes-subscribe@topica.com

Jewish Recipe Collection Newsletter:
jewishrecipes-subscribe@topica.com

 

 

Barnes & Noble Home Page  Barnes & Noble Music Page

 

Tired of Geek Speak when 
you have Computer Questions?

 

 

 

WatkinsOnline.com