mineral
Polished banded agate pendant
Agate, microcrystalline quartz (SiO₂), a chalcedony variety
AI-generated identification · may be incorrectHardness 6.5–7 Mohs; cream, honey-yellow, and brown bands with a waxy-to-glassy polish. Agate is cryptocrystalline quartz with no visible cleavage; the metal fitting and wire are not geological material.
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Physical properties
Hardness 6.5–7 Mohs; cream, honey-yellow, and brown bands with a waxy-to-glassy polish. Agate is cryptocrystalline quartz with no visible cleavage; the metal fitting and wire are not geological material.
Formation & geological history
Agate forms as silica-rich fluids fill cavities in volcanic rock, depositing chalcedony in layers; the exact age and source cannot be determined from the image.
Uses & applications
Polished agate is used for jewelry, ornaments, and small carvings.
Geological facts
The rounded, banded appearance is consistent with agate fashioned into a pendant, though the photograph cannot establish the exact variety.
Field identification & locations
Look for curved or concentric bands and a hard, glassy surface; agates occur worldwide, commonly in volcanic rocks and stream gravels. Similar small polished pendants typically sell for about $5–$30 USD.
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