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Figure 1.2

Olivine group minerals

Fayalite (Fe2SiO4)

Forsterite (Mg2SiO4)

Several different mineral species make up the mineral group olivine, including fayalite and forsterite as shown here. Olivine group minerals make up a significant proportion of the interiors of terrestrial planets like Earth and (probably) Mars.

Figure 1.1

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