Minerals
description
Transcript of Minerals
inorganicNaturally occurrin
g
solidCrystal structure
definite chemical make-up
Video clip “What is a mineral?’Media player quicktime
gold
water
coal
rubies
petroleum
diamonds
Here is a hard one – What about ice?
All minerals have a definite chemical combination – view media player video
Same video - quicktime
One way is color!
http://www.minresco.com
http://www.gems-afghan.com
http://www.globalcrystals.com
http://www.prettyrock.com
Not all minerals have the same hardness. Some you can easily scratch with your fingernail!
http://www.infowest.com
/vwdocs/vwlessons
http://www.prettyrock.com
http://www.wpclipart.com
http://www.wpclipart.com
http://www.uky.edu/KGS
Streak is the color of a mineral powder. Many minerals appear a different color when powdered than they do as a big piece. The color may be entirely different, or it may be a different shade.
http://cmsc.minotstateu.edu
http://cmsc.minotstateu.edu
Copyright © Dr. Richard Busch
Courtesy United States Geological Survey Courtesy United States Geological Survey
Each reflects light differently – that is luster!
Which of these words would you use to describe these minerals?Glassy, metallic, dull, silky, waxy, pearly
This means for equal size, they have their own special weight.
http://www.palagems.com
Which one is worth more?
How could you tell?
The first one is topaz (worth a lot) and the second is citrine quartz (not worth a lot).
A scientist would measure their densities and they would be different!
Copyright © Dr. Richard Busch
http://www.wired-artist-jewelry.comhttp://webphysics.davidson.edu
http://www.fabreminerals.com
http://www.fabreminerals.comLink to crystal video media player
quicktime
Cleavage means it breaks the same way every time.
Fracture means it breaks in a random pattern that cannot be predicted.
www.mrsciguy.com
Calcite and halite break a special way.
donsmaps.com www.visionlearning.com
Quartz and chert break in a random pattern. There is not way to predict how they break.
Click here for a video clip on mineral properties media player Quicktime
Another video clip on identifying mineralsMedia player
Quicktime