Quartz
Image: <a rel="nofollow" class="external text" href="https://www.flickr.com/people/65449832@N00">R'lyeh Imaging</a> (CC BY 2.0)
Mineral NameQuartz
Chemical FormulaSiO2
Mohs Hardness7
Crystal Systemtrigonal
Lustervitreous
Streak Colorwhite
Cleavagenone
Fractureconchoidal
Specific Gravity2.65
Colorscolorless, white, pale yellow, brown
Transparencytransparent
Type LocalityWorldwide
Mineral GroupSilicates
Usesjewelry, industrial, collector
Associated Mineralschalcedony, calcite, feldspar, hematite
Raritycommon
Description
The image displays a macro view of the interior of a geode, featuring numerous small, well-formed, transparent to translucent quartz crystals. Some crystals exhibit a pale yellowish-brown tint, likely due to iron staining or inclusions.
Geological Context
Quartz geodes typically form in volcanic or sedimentary rocks where mineral-rich water infiltrates cavities, depositing layers of silica that crystallize inwards over time to create the characteristic crystal-lined interior.
