Agate
Image: <a href="//commons.wikimedia.org/wiki/User:Sailko" title="User:Sailko">Sailko</a> (CC BY-SA 3.0)
Mineral NameAgate
Chemical FormulaSiO2
Mohs Hardness6.5
Crystal Systemtrigonal
Lusterwaxy
Streak Colorwhite
Cleavagenone
Fractureconchoidal
Specific Gravity2.6
Colorsyellow, orange, brown, black
Transparencytranslucent
Type LocalityWidely distributed (e.g., Brazil, Uruguay, Mexico, USA)
Mineral GroupSilicates
Usesjewelry, ornamental objects, industrial, collector
Associated Mineralsquartz, calcite, zeolites
Raritycommon
Description
This image displays a translucent agate with intricate, swirling bands and patterns in warm tones of yellow, orange, and brown, with some darker accents. The polished surface reveals the characteristic layered structure.
Geological Context
Agate forms in cavities of volcanic rocks or ancient lavas, where silica-rich fluids deposit layers of cryptocrystalline quartz (chalcedony) over time, often creating concentric banding or other intricate patterns.
