Quartz
Image: “Jon Zander (<a href="//commons.wikimedia.org/wiki/User:Digon3" title="User:Digon3">Digon3</a>)" (CC BY-SA 3.0)
Mineral NameQuartz
Chemical FormulaSiO2
Mohs Hardness7
Crystal Systemtrigonal
Lustervitreous
Streak ColorWhite
CleavageNone
FractureConchoidal
Specific Gravity2.65
Colorswhite, grey, yellowish-brown
Transparencytranslucent
Type LocalityWorldwide
Mineral GroupSilicates
Usesjewelry, industrial, collector
Associated Mineralsfeldspar, mica, calcite, pyrite
Raritycommon
Description
The image displays a dense cluster of small, prismatic to stubby quartz crystals, ranging from translucent to opaque white and grey, with some areas showing yellowish-brown staining on a darker matrix.
Geological Context
Quartz is a common rock-forming mineral found in igneous, metamorphic, and sedimentary rocks, frequently crystallizing from hydrothermal solutions in veins and geodes.
