Quartz
Image: <a rel="nofollow" class="external text" href="https://www.flickr.com/people/14730981@N08">James Petts</a> from London, England (CC BY-SA 2.0)
Mineral NameQuartz
Chemical FormulaSiO2
Mohs Hardness7
Crystal Systemtrigonal
Lustervitreous
Streak Colorwhite
Cleavagenone
Fractureconchoidal
Specific Gravity2.65
Colorsclear, white, light brown, yellowish
Transparencytransparent
Type LocalityNot specified
Mineral GroupSilicates
Usesjewelry, industrial, collector
Associated Mineralsbaryte, feldspar, calcite
Raritycommon
Description
A cluster of small, well-formed, transparent to translucent quartz crystals, exhibiting a range of colors from clear to milky white, with some light brown and yellowish tints, growing on a matrix.
Geological Context
Quartz is a ubiquitous mineral found in igneous, metamorphic, and sedimentary rocks, crystallizing from magma, hydrothermal solutions, and forming in veins and vugs within various rock types.
