Two examples of framework silicates are and . a) olivine; pyroxene.
b) biotite; muscovite.
c) quartz; feldspar.
d) amphibole; olivine.
e) calcite; dolomite.

C; quartz and Feldspar

Explanation:

Silicates are rock forming minerals that make up the bulk of the earth crust.

These silicates are divided into several groups based on how the silicate anion present is structured.

While we have several groups as stated, the largest groups of silicates are known as the framework silicates. These particular silicates type make up the bulk of the earth crust.

Example of these kinds of silicates are quartz and feldspar

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