 Naturally Occurring  Solid  Crystal Structure  Inorganic.

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Presentation transcript:

 Naturally Occurring  Solid  Crystal Structure  Inorganic

1. COLOR  Most easily observed, but the least useful  Many minerals have the same color/change color

2. LUSTER : the way a mineral shines reflected light -Metallic -Nonmetallic

Glassy look of glass Silky Look of parallel fibers Pearly Look of pearls, creamy Greasy Looks coated in oil Dull No sheen seen

3. STREAK the color of the minerals powder (no matter the color, streak will always be the same)

 4. CLEAVAGE vs. FRACTURE  Cleavage shows smooth flat surfaces forming if mineral is broken  Fracture shows curved or rough surfaces if a mineral is broken

 5. DENSITY measure of how much matter is in a certain space  Specific Gravity = weight of mineral divided by weight of equal volume of water

 6. HARDNESS is a minerals resistance to being scratched  Mohs Hardness Scale 1 (soft) – 10 (hard)

 Special Properties  Magnetism  Fluorescence  Double Refraction  Radioactivity  Chemical Reactions