Identifying Minerals Foldable.

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Presentation transcript:

Identifying Minerals Foldable

Amethyst Purple quartz Color (1st Flap) Citrine quartz Some minerals can come in a variety of colors (example: quartz) Not a reliable indicator Rose Pink quartz Clear/cloudy quartz Polished smokey quartz Smokey gray quartz Clear (or colorless) quartz

Luster (2nd Flap) The way the surface reflects light Shiny or dull Metallic Dull Nonmetallic Luster (2nd Flap) The way the surface reflects light Shiny or dull Pearly or glassy Metallic or Nonmetallic Submetallic Shiny Nonmetallic Dull Nonmetallic Shiny Metallic

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) Mica The way a mineral breaks Cleavage=break along smooth, flat surfaces Fracture=break unevenly, rough, jagged surface Conchoidal fracture (curved)

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

Mohs Hardness Scale

Other Properties (6th Flap) Magnetic Acid causes fizzing to occur (Chemical reaction) Taste Radioactivity/fluorescence Halite is salty Uranium Radioactive Fluorescence Andersonite Radioactive