mineral
Quartz (Agate/Jasper)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, waxy to vitreous luster, conchoidal fracture, and typically yellowish-brown to amber coloration.
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Physical properties
Hardness of 7 on the Mohs scale, waxy to vitreous luster, conchoidal fracture, and typically yellowish-brown to amber coloration.
Formation & geological history
Formed through the deposition of silica-rich fluids in cavities of ancient volcanic or sedimentary rocks.
Uses & applications
Widely used in lapidary arts, decorative items, jewelry, and as a popular specimen for rock collectors.
Geological facts
Yellowish varieties are often called quartz, yellow jasper, or citrine depending on trace mineral impurities and transparency.
Field identification & locations
Identify by its high hardness (scratches glass) and smooth water-worn surface; commonly found in riverbeds and gravel deposits worldwide.
