mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on Mohs scale, typically white to grey with a waxy or vitreous luster, forming in rounded, grape-like botryoidal clusters.
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Physical properties
Hardness of 6.5-7 on Mohs scale, typically white to grey with a waxy or vitreous luster, forming in rounded, grape-like botryoidal clusters.
Formation & geological history
Formed through the deposition of silica-rich hydrothermal solutions or groundwater within cavities in rocks at low temperatures.
Uses & applications
Used primarily as decorative ornamental stone, in lapidary arts, and prized by mineral collectors.
Geological facts
The term botryoidal comes from the Greek word for a bunch of grapes, describing its distinct rounded aggregate growth habit.
Field identification & locations
Identified by its curved, bulbous surface texture and conchoidal fracture visible in broken sections; found worldwide in volcanic cavities.
