Agate
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Mineral NameAgate
Chemical FormulaSiO2
Mohs Hardness6.5
Crystal Systemtrigonal
Lustervitreous
Streak Colorwhite
Cleavagenone
Fractureconchoidal
Specific Gravity2.6
Colorsorange, white, brown
Transparencytranslucent
Type LocalityWorldwide (e.g., Brazil, Uruguay, Mexico, USA)
Mineral GroupSilicates
Usesjewelry, ornamental, lapidary, collector
Associated Mineralsquartz, calcite, zeolites
Raritycommon
Description
This image displays a close-up of banded agate, featuring distinct layers of orange, white, and brownish hues, characteristic of its concentric or parallel growth patterns.
Geological Context
Agate forms primarily in the cavities of volcanic rocks, where silica-rich fluids deposit successive layers of chalcedony, often filling geodes or veins over time.
