The mineral Olivine is a series between two end members, fayalite and forsterite. Fayalite is the iron rich member while forsterite is the magnesium rich member.

Depending on its exact form, it can be a gemstone (Peridot) or a sand used as an abrasive, or refractory purposes.

false.

SiO2 + CaMg(CaCO3)2 -> MgSiO4 + CaCO3 + CO2 (not balanced)

Quartz + Dolomite -> Forsterite +Calcite + excess CO2 that is released as gas

Forsterite is a type of olivine. Olivine's chemical formula is (Mg,Fe)SiO4, with the Mg as forsterite and the Fe as fayelite.

Oceanic crust is rick in basalt and gabbro and these rocks have a very low quartz content or are void of it. Continental crust contains a large amount of granitic rocks from which quartz is found in most frequently.

Olivine usually forms in very hydrous situations where there is water involved, and comes from oceanic crust usually.

• four common members of olivine family that is 1) FORSTERITE ((Mg)

  2SiO

  4.

• 2) fayalite(Fe)

  2SiO

  4

• 3)olivineMn

  SiO

  4

• 4) tephorite(

  Mn2SiO

  4)

Fire Agate

Fire Opal

Fluorite

Fossil Coral