Druzy Quartz
Image: Zopilote0 (CC BY 2.0)
Mineral NameDruzy Quartz
Chemical FormulaSiO2
Mohs Hardness7
Crystal Systemtrigonal
Lustervitreous
Streak ColorWhite
CleavageNone
FractureConchoidal
Specific Gravity2.65
Colorsbeige, light brown, reddish-brown
TransparencyTranslucent
Type LocalityWorldwide
Mineral GroupSilicates
Usesjewelry, ornamental, collector
Associated Mineralscalcite, feldspar, goethite
Raritycommon
Description
A botryoidal aggregate of small, sparkling quartz crystals, exhibiting a light beige to brown color with some reddish-brown iron staining and hollow, rounded structures.
Geological Context
Druzy quartz forms as a secondary mineral, lining vugs and cavities in various rock types, often in hydrothermal environments or sedimentary settings where silica-rich fluids deposit microcrystalline quartz.
