What are silicates and Silicones? 

Silicates: A silicate (SiO₄^4-) is a compound containing a silicon bearing anion. The silicates are the largest, the most interesting and the most complicated class of minerals than any other minerals. Approximately 30% of all minerals are silicates and some geologists estimate that 90% of the Earth's crust is made up of silicates, (SiO₄^4-) based material. Thus, oxygen and silicon are the two most abundant elements in the earth's crust.

Silicones: Silicones are polymers that include silicon together with carbon, hydrogen, oxygen, and sometimes other elements. Some common forms include silicone oil, silicone grease, silicone rubber, silicone resin. Silicones are inert, synthetic compounds with a variety of forms and uses. Typically heat-resistant and rubber-like, they are used in sealants, adhesives, lubricants, medical applications, cookware, and insulation. These are group of organosilicon polymers. The repeating units is  . These are prepared by polymerization of alkyl or aryl substituted silicon chlorides, R_nSiCl_{(4 − n),}