Clue 1 - Minerals - Station 9     Characteristic properties:  Crystal shape
Wednesday, May 09, 2012
8:39 AM
Station 9:  Crystal shape
Second most common mineral in the Earth's crust
How to draw a cube
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Cube vs. rhombohedron 
(like calcite)
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Examples of exotic crystal  shapes
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Natural crystal shapes vs. faceted gemstones
Minerals grow into certain shapes.  
Observe the crystal shapes.
Shape
Mineral
Cube
Rhombohedron
Observe the well-formed crystal of quartz.
How many long sides does a quartz crystal have?    ●
Does a quartz crystal form a point?  ●
A shape that has more than three triangular sides that meet at a single point is called a pyramid.    Quartz crystals form a pyramid shape.  The term pyramid is used to describe a general shape with any number of sides that form a point, not just four sides  like the Great Pyramid of Giza in Egypt. 