Subject: Identifying Minerals

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SubjectIdentifying Minerals

• Mr. Mathews 6th Grade Earth Science

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Main Idea Details

• I. Color
• Varieties of Quartz

• A. Same mineral can come in different colors
• B. Color not best way to identify minerals

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Main Idea Details

• II. Luster

• A. The way light reflects off surface.
• B. 3 Types
• 1. Metallic shiny like metal
• a. Galena and Pyrite
• 2. Submetallic dull like metal
• a. Magnetite
• 3. Nonmetallic dull or shiny not metal
• a. Sulfur, Talc, Calcite, Fluorite, Quartz

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1. Metallic

• a. Galena and Pyrite

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2. Submetallic

• a. Magnetite

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3. Nonmetallic

• a. Sulfur, Talc, Calcite, Fluorite, Quartz

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Main Idea Details

• III. Streak

• A. Color of mineral in powder form
• B. Color of minerals streak not always same as
  the mineral

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Main Idea Details

• IV. Cleavage
• and Fracture

• A. The way mineral breaks
• 1. Cleavage breaks in flat smooth surface
• 2. Fracture rough, uneven break

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1. Cleavage
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IV. Fracture

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Main Idea Details

• V. Hardness

• A. How easy or hard to scratch
• B. Measured using Mohs Hardness Scale

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Main Idea Details

• V. Hardness

• C. The easier to scratch the lower the . The
  harder to scratch the higher the .

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Main Idea Details

• VI. Special Properties

• A. Fluorescence
• B. Chemical Reaction
• C. Magnetism
• D. Taste