gemstone
Agate
SiO2 (Cryptocrystalline Quartz)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, and variable banded colors.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy to vitreous luster, and variable banded colors.
Formation & geological history
Forms by the deposition of silica from groundwater in the cavities of igneous and sedimentary rocks.
Uses & applications
Widely used in jewelry, decorative ornaments, and gemstone bead crafting.
Geological facts
Agate has been used since antiquity for talismans, seals, and ornate vessels.
Field identification & locations
Identified by its distinct concentric banding and conchoidal fracture; commonly found worldwide.
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