a Mineral. One of the most common minerals on Earth.
Composition
- Silicon Dioxide SiO2
- Trace elements of Al, Li, Ge
Physical Properties
- Chemically stable
- Resistant to weathering
- Inert - does not easily react with other substances
Chemical Properties
- Hard - ranks 7 in Mohs hardness test for minerals
- Some varieties are transparent or coloured based on trace element composition
- Piezoelectricity - generates electric charge when subjected to mechanical stress
- High melting point of about 1600 degree Celsius
Applications
- Production of oscillators and frequency control devices due to piezoelectricity
- Aggregate in concrete, production of glass and ceramics
- Jewelry
- Optics - used in lenses and prisms