Minerals and Igneous Rocks

Which three minerals are most likely used in the construction of a house?

• graphite, pyrite, and halite

• garnet, galena, and sulfur

• talc, amphibole, and fluorite

• selenite gypsum, dolomite, and muscovite mica

The data table below gives characteristics of the gemstone peridot.

Peridot is a form of the mineral

• pyrite

• pyroxene

• olivine

• garnet

Which characteristic do samples of the mineral pyroxene normally exhibit?

• hardness of 5 to 6

• cleaves at 56° and 124°

• bubbling in hydrochloric acid

• yellow to amber color

Which mineral will scratch fluorite, galena, and pyroxene?

• graphite

• calcite

• olivine

• dolomite

What is the origin of fine-grained igneous rock?

• lava that cooled slowly on Earth's surface

• lava that cooled quickly on Earth's surface

• silt that settled slowly in ocean water

• silt that settled quickly in ocean water

An extrusive igneous rock with a mineral composition of 35% quartz, 35% potassium feldspar, 15% plagioclase feldspar, 10% biotite, and 5% amphibole is called

• rhyolite

• granite

• gabbro

• basaltic glass

Which diagram best represents the silicon-oxygen tetrahedron of which talc, feldspar, and quartz are composed?

• 
• 
• 
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The physical properties of minerals result from their

• density and color

• texture and color of streak

• type of cleavage and hardness

• internal arrangement of atoms

Which two minerals are commercial sources of iron?

• galena and graphite

• hematite and magnetite

• garnet and flourite

• muscovite mica and biotite mica

The minerals talc, muscovite mica, quartz, and olivine are similar because they

• have the same hardness

• are the same color

• contain silicon and oxygen

• break along cleavage planes