Quartz
Image: Johnson Mush (CC0)
Mineral NameQuartz
Chemical FormulaSiO2
Mohs Hardness7
Crystal Systemtrigonal
Lustervitreous
Streak Colorwhite
Cleavagenone
Fractureconchoidal
Specific Gravity2.65
Colorscolorless, white, milky
Transparencytransparent to translucent
Type LocalityNot discernible from image (found worldwide)
Mineral GroupSilicates
Usesjewelry, industrial, collector, ornamental
Associated MineralsNot discernible from image
Raritycommon
Description
A large, prominent cluster of milky to clear quartz crystals, possibly a geode or a large crystal formation, displayed on a stand in a private geological museum.
Geological Context
Quartz is one of the most abundant minerals in Earth's crust, forming in a wide range of geological environments including igneous, metamorphic, and sedimentary rocks. Large crystal clusters like this typically form in hydrothermal veins or pegmatites.
