Minerals

1. Color Streak – Color of the minerals powder Luster - how does light reflect Minerals Waxy Metallic Glassy Pearly Dull earthy Minerals are solid ,naturally occurring ,inorganic ,with a definite chemical composition and crystal structure. • Cleavage- How does the mineral break? • Jigedy and jagedy • Smooth cut • Other special test: • Magnetic • Fluorescent • Smell • Optical pos with acid • (H = 2.5) Moh’s Hardness note never scratch the mineral (H= 6.5)

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3. Rocks Solid ,naturally occurring mass, which may contain parts of living organisms or other materials Texture ~ what size are the grains? No grains glassy Fine grains Med grains Course grains Color ~ Dark = mafic Light = felsic Mixed = both Origin ~ Igneous – glassy/holes/crystals Sedimentary-soft /layers breakable/organisms or rocks Metamorphic – very hard/layers/shiny Use Rock Cycle notes ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Special properties ~ Magnetic Acid reaction smell gems