Mineral ID Study

Soft earthy or metallic luster, red streak

• Hematite

• Graphite

• Bauxite

• Dolomite

Magnetic, Metalic luster

• Magnetite
• Hematite
• Pyrite
• Malachite

Gold metallic, gray streak

• Olivine

• Pyrite
• Albite

• Hematite

Soft, gray metallic, writes easily

• Talc

• Graphite

• Sulfur

• Halite

Brassy metallic yellow, can have hints of purple and other colors  

• Garnet

• Kaolin

• Pyrite

• Chalcopyrite

Soft, cleavage, reacts with HCl

• Calcite
• Fluorite
• Gypsum
• Quartz

Hard, cleavage, generally dark in color

• Augite/Pyroxene

• Calcite

• Quartz

• Potassium Feldspar

Soft, can be scratched with a fingernail, generally light in color

• Calcite
• Gypsum
• Talc
• Quartz

Hard, conchoidal fracture, no cleavage, variety of colors

• Muscovite

• Fluorite
• Quartz
• Calcite

Hard, cleavage, generally dark in color

• Hornblende

• Malachite

• Limonite

• Augite