mineral identification

• Graphite 


  Metallic

  Hardness: 1

  Streak: Dark gray; Silver gray

  feels Greasy
• Sphalerite

  Metallic

  Hardness: 4

  Cleavage: 6d

  Streak: Pale Yellow; brown to green streak

  massive , smells like sulfur
• Native Copper


  Metallic Luster

  Hardness: 2.5

  Streak: copper; brown to green

  massive
• Limonite


  Metallic

  Streak: Yellow-brown; yellow brown to dark brown

  hardness: variable 1 - 6

  sometimes found in round masses

  earthy appearance
• Bornite


  Metallic

  Hardness: 3

  Streak: Gray-black; black to bronze

  tarnish: purple to green

  massive
• Galena


  Metallic

  Hardness: 2.5

  Streak: gray black; silvery gray

  very heavys
• Chalcopyrite 


  Metallic Luster

  Hardness: 4

  Streak: gray black ; golden yellow

  massive
• Hematite


  Metallic

  Hardness: 5-6

  Streak: Red brown; gray or reddish brown

  platy appearance
• Pyrite


  Metallic

  Hardness: 6

  Streak: greenish black; brass yellow

  aggregate of cubic crystals
• Magnetite 


  Metallic

  Hardness: 6

  Streak: gray black; black

  granular

  magnetic
• Limonite 


  Nonmetallic

  Hardness: 1-3

  Color: yellow brown

  Cleavage: absent

  Appearance: earthy

  powders easily, fake mineral
• Hematite


  Nonmetallic

  Hardness: 1-5

  Color: reddish brown ; streak: red

  Cleavage: absent

  Appearance: earthy
• Native Copper

  Nonmetallic Luster Hardness: 2.5 Cleavage: absent

  tarnished- brown to green

  massive
• Biotite mica


  Nonmetallic Luster

  Hardness: 2.5 - 3

  color: dark brown to black

  Cleavage: present basal

  Appearance: elastic in thin sheets black mica
• Sphalerite

  Nonmetallic Luster

  Hardness: 4

  Color: yellow brown to black ; Streak: light yellow

  Cleavage: present, 6d
• Olivine


  Nonmetallic Luster

  Hardness: 6.5-7

  Color: olive green

  Cleavage: absent

  Appearance: small glassy grains
• Corundum

  Nonmetallic Luster

  Hardness: 7

  color: gray to brown

  Cleavage: absent

  Appearance: hexagonal crystals common
• smoky quartz

  Nonmetallic Glassy Luster

  Hardness: 6.5-7.5

  Cleavage: absent ; fracture: conchoidal
• Plagioclase Feldspar

  Nonmetallic luster

  Hardness: 6

  Cleavage: present prismatic

  Appearance: with striations
• Hornblende

  Nonmetallic luster

  Hardness: 5 - 6

  Cleavage: present prismatic parallelogram
• Augite


  Nonmetallic luster Hardness: 5 - 6 Cleavage: present prismatic

  color: greenish black to black