minerals chap. 4 what are minerals? identifying minerals

Download Minerals Chap. 4 What are Minerals? Identifying Minerals

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  • Slide 1
  • Minerals Chap. 4 What are Minerals? Identifying Minerals
  • Slide 2
  • Which of these are minerals? AMBER COAL PEARL SUGAR QUARTZ HALITE MICA
  • Slide 3
  • How many types of minerals do you think there are in the earths crust?
  • Slide 4
  • About 3000, but only 30 minerals are common. About 3000, but only 30 minerals are common.
  • Slide 5
  • What are minerals? 4.1Objectives Define a mineral Describe how minerals form. Identify the most common elements in Earths crust.
  • Slide 6
  • I.Mineral
  • Slide 7
  • Mineral Naturally occurring, inorganic solid with a specific chemical composition and definite crystalline structure
  • Slide 8
  • A.Naturally occurring, inorganic I.Mineral
  • Slide 9
  • A.Naturally occurring, inorganic B.Solids with specific compositions I.Mineral
  • Slide 10
  • A.Naturally occurring, inorganic B.Solids with specific compositions C.Definite crystalline structure I.Mineral
  • Slide 11
  • Crystal Systems Cubic Tetragonal Hexagonal Orthorhombic Monoclinic Triclinic
  • Slide 12
  • I.Mineral II. Mineral formation A.Some from magma
  • Slide 13
  • I.Mineral II. Mineral formation A.Some from magma B.Some from solutions
  • Slide 14
  • III. Mineral Groups
  • Slide 15
  • A.Silicates III. Mineral Groups
  • Slide 16
  • Silicates -Made of silicon and oxygen
  • Slide 17
  • Silicates -Make up about 96% of minerals found in earths crust
  • Slide 18
  • Silicates -Made of silicon and oxygen -Make up about 96% of minerals found in earths crust -Include feldspar and quartz.
  • Slide 19
  • A.Silicates B.Carbonates III. Mineral Groups
  • Slide 20
  • Carbonates -Made of metal bonded to carbonate, CO 3 2-
  • Slide 21
  • Carbonates -Found in limestone, malachite and marble
  • Slide 22
  • A.Silicates B.Carbonates C.Oxides III. Mineral Groups
  • Slide 23
  • Oxides -Made of metal bonded to oxygen
  • Slide 24
  • Oxides -Hematite Fe 2 O 3 and magnetite Fe 3 O 4 are common iron oxide minerals
  • Slide 25
  • A.Silicates B.Carbonates C.Oxides D.Halides III. Mineral Groups
  • Slide 26
  • A.Silicates B.Carbonates C.Oxides D.Halides E.Native Elements III. Mineral Groups
  • Slide 27
  • A.Silicates B.Carbonates C.Oxides D.Halides E.Native Elements F.Sulfates III. Mineral Groups
  • Slide 28
  • The End
  • Slide 29
  • Identifying Minerals 4.2 Objectives Classify minerals according to their physical and chemical properties Identify different types of minerals Discuss how minerals are used
  • Slide 30
  • I.Mineral Identification
  • Slide 31
  • A.Color rhodochrositemalachite turquoise azurite
  • Slide 32
  • I.Mineral Identification A.Color B.Luster (shininess) Luster is the way the mineral surface reflects light.
  • Slide 33
  • I.Mineral Identification A.Color B.Luster (shininess) 1. metallic galenapyrite
  • Slide 34
  • I.Mineral Identification A.Color B.Luster (shininess) 1. metallic 2. non-metallic feldspar olivine
  • Slide 35
  • I.Mineral Identification A.Color B.Luster C.Texture Texture is how a mineral feels to the touch.
  • Slide 36
  • I.Mineral Identification A.Color B.Luster C.Texture Talc: feels greasy fluorite: feels smooth
  • Slide 37
  • I.Mineral Identification A.Color B.Luster C.Texture D.Streak Streak is the color of the powder of the mineral.
  • Slide 38
  • I.Mineral Identification A.Color B.Luster C.Texture D.Streak Hematite: Reddish brown streak Pyrite: Dark gray- black streak
  • Slide 39
  • I.Mineral Identification A.Color B.Luster C.Texture D.Streak E.Hardness Hardness is a measure of how easily a mineral is scratched.
  • Slide 40
  • Slide 41
  • I.Mineral Identification F.Cleavage and Fracture Fracture means a mineral breaks with jagged, rough edges Cleavage means a mineral splits easily and evenly along one or more flat planes.
  • Slide 42
  • Mica: exhibits basal cleavage Cleavage or Fracture?
  • Slide 43
  • Halite: exhibits cubic cleavage Cleavage or Fracture?
  • Slide 44
  • Obsidian: exhibits fracture Cleavage or Fracture?
  • Slide 45
  • I.Mineral Identification F.Cleavage and Fracture G.Density and Specific Gravity Density is a measure of the mass per unit of volume.
  • Slide 46
  • I.Mineral Identification F.Cleavage and Fracture G.Density and Specific Gravity H.Other properties
  • Slide 47
  • I.Mineral Identification F.Cleavage and Fracture G.Density and Specific Gravity H.Other properties 1. refraction Refraction means the bending of light
  • Slide 48
  • I.Mineral Identification F.Cleavage and Fracture G.Density and Specific Gravity H.Other properties 1. refraction 2. reacting with HCl
  • Slide 49
  • II.Other terms
  • Slide 50
  • A.Ores A material for which it is profitable to mine
  • Slide 51
  • II.Other terms A.Ores B.Gems Valuable minerals prized for rarity and beauty
  • Slide 52
  • The End

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