Page 27 - Curriculum Visions Dynamic Book

 Muscovite is a brown form of mica. This sample shows the flakey nature of the material and its more massive form. Transparent sheets are just
a few atoms thick.
 The structure of sheet silicates.
Serpentine
The mottled and flakey green mineral called serpentine is made of magnesium silicate. Serpentine often has a
flinty appearance and a dull lustre. It is formed from the remelting of igneous rocks in the presence of hot water and has much the same chemical composition as olivine, from which it may have been formed (see page 21).
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