Saturday, October 27, 2012

Crystals & Minerals

Crystals
   In Crystal Growth Lab, we made a solution by mix the mineral, then replaced this solution to the window,  to let them grow the crystal by the 10 days.  In each day, we need to measured the crystal, and to observed the crystal, like: color, shape. That help us to see how they growth, and wrote down into the data.

Mineral Properties
  Color - a color other than white or clear












 Luster - metallic: look like metal                      










  Non metallic: does not look like metal











Streak - scratch the mineral on the streak plate












  Hardness- soft and hard












 Cleavage- break evenly                         








Fracture- break unevenly










Mineral Identification                            

Sulfur 


 * Nonmetallic luster
 * White- yellow streak
 *  Yellow to amber
 * Soft (2)
 * Fracture




 Pyrite

 * Metallic luster
 * Green- black streak
 * Brassy Yellow
 * Hard (6.5)
 * Fracture










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