Physical Properties Of Minerals

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Presentation transcript:

Physical Properties Of Minerals 16 NOV 2015

Starter: Students collected mineral samples on a field trip and tested them for different properties. The students used the Moh’s Hardness scale to determine the identity of the mineral. They determined that the mineral had a hardness of 4.5. Which of the following statements is true about the mineral? Mineral Hardness Diamond 10 Corundum 9 Topaz 8 Quartz 7 Feldspar 6 Apatite 5 Fluorite 4 Copper Penny 3.5 Calcite 3 Fingernail 2.5 Gypsum 2 Talc 1 4.5 A the mineral can scratch talc and be scratched by calcite B the mineral is harder than topaz but not harder than apatite C the mineral can scratch a copper penny and be scratched by feldspar. D the mineral is harder than fluorite and feldspar.

Practice Streak Cleavage Luster Hardness Color Fracture Properties of Minerals Streak Cleavage Fracture Luster Hardness Color

Color Some have only one color- ex: gold Others have a variety of colors- ex: Calcite can be pink, blue, orange, red, brown, white, clear

Streak Color of crushed mineral powder A mineral always has same color streak ex: Calcite can be pink, blue, orange but the streak is always white.

Cleavage Minerals are made of crystals When broken, the crystal has a particular shape

Fracture The way mineral is broken down Smooth, irregular, jagged, splintery

Luster Way surface reflects light Metallic, silky, pearly, dull

Hardness Resistance to being scratched Measure Mohs’ hardness scale 1 is the softest-10 is the hardest

Application/ connection :

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