Silicates are minerals that contain silicon and oxygen, which are the two most abundant elements in the Earth's crust. They make up about 90% of the Earth's crust and include common minerals like quartz, feldspar, and mica.

Here's a breakdown of mineral groups and their abundance:

* Silicates (90%): This is the largest and most diverse group of minerals.

* Carbonates (5%): These minerals contain carbonate ions (CO3)2-. Examples include calcite and dolomite.

* Oxides (5%): These minerals contain oxygen combined with metal ions. Examples include hematite and magnetite.

* Sulfides (1%): These minerals contain sulfur combined with metal ions. Examples include pyrite and galena.

* Halides (1%): These minerals contain halogen ions (fluorine, chlorine, bromine, iodine). Examples include halite and fluorite.

* Sulfates (1%): These minerals contain sulfate ions (SO4)2-. Examples include gypsum and barite.

* Phosphates (1%): These minerals contain phosphate ions (PO4)3-. Examples include apatite.

While other mineral groups exist, they make up a much smaller proportion of the Earth's crust.