Identifying Minerals Foldable. Color (1 st Flap) Some minerals can come in a variety of colors...
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Transcript of Identifying Minerals Foldable. Color (1 st Flap) Some minerals can come in a variety of colors...
Color (1st Flap)Color (1st Flap)
Some minerals can come in a variety of colors (example: quartz)
Not a reliable indicator
Citrine quartz
Amethyst Purple quartz
Rose Pink quartz
Smokey gray quartzClear (or colorless) quartz
Clear/cloudy quartz
Polished smokey quartz
Luster (2nd Flap)Luster (2nd Flap)
The way the surface reflects light
Shiny or dull Pearly or glassy Metallic or Nonmetallic
Metallic
Dull Nonmetallic
Submetallic Shiny Nonmetallic
Dull Nonmetallic Shiny Metallic
Streak (3rd Flap)Streak (3rd Flap)
Color of a mineral in a powder form Rub mineral against a piece of unglazed
porcelain (called a streak plate) More reliable test than color
Streak Plate
Mineral in powder form
Cleavage and Fracture(4th Flap)Cleavage and Fracture(4th Flap)
The way a mineral breaksCleavage=break along smooth, flat surfaces
Fracture=break unevenly, rough, jagged surface
Mica
Conchoidal fracture (curved)
Hardness (5th flap)Hardness (5th flap)
Measure of how easily a mineral can be scratched
To determine the hardness of minerals scientist use the Mohs hardness scale
1-Talc 10-Diamonds