Please compare and contrast muscovite and biotite.
a. Both muscovite and biotite are feldspars that have cleavage in two directions and have a shiny luster. However, unlike clear muscovite, biotite is black because it contains iron and magnesium.
b. Both muscovite and biotite are micas that have cleavage in two directions and have a shiny luster. However, unlike clear muscovite, biotite is black because it contains iron and magnesium.
c. Both muscovite and biotite are micas that have cleavage in one direction and have a shiny luster. However, unlike clear muscovite, biotite is black because it contains iron and magnesium.
d. Both muscovite and biotite are micas that have cleavage in one direction and have a shiny luster. However, unlike clear biotite, muscovite is black because it contains iron and magnesium.
e. Both muscovite and biotite are feldspars that have cleavage in one direction and have a shiny luster. However, unlike clear muscovite, biotite is black because it contains iron and magnesium.
c. Both muscovite and biotite are micas that have cleavage in one direction and have a shiny luster. However, unlike clear muscovite, biotite is black because it contains iron and magnesium.
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