Rocks & Minerals
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Minerals
Facts About 20 common minerals
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Fluorite
Calcite
Orthoclase Feldspar
Agate
Amethyst
Rose Quartz
Milky Quartz
Gypsum
Talc
Malachite
Azurite
Olivine
Galena
Hemitite
Magnetite
Pyrite
Sulfur
Biotite Mica
Muscovite Mica
What is a mineral??
Three Common Rocks
Igneous Rock
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Granite
Migmatite
Sedimentary Rock
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Limestone
Sandstone
Metamorphic Rock
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Schist
Marble
The Rock Cycle
Otthoclase Feldspar
The most common color of Orthoclase Feldspar is salmon (pinkish orange.) Large,
pure pieces of orthoclase display two directions of cleavage oriented at right
angles to each other. Orthoclase has a hardness of 6 on Mohs scale of hardness
and therefore can be scratched by a piece of quartz.
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