gemstone
Banding Agate / Jasper Heart
Silicon Dioxide (Chalcedony / Quartz), SiO2
AI-generated identification · may be incorrectHardness: 6.5 to 7 on the Mohs scale. Color: multicolored with distinct bands of brown, red, white, and tan. Luster: vitreous to waxy when polished. Crystal structure: microcrystalline (cryptocrystalline quartz). Cleavage: none.
- Hardness
- 6
- Luster
- vitreous to waxy when polished
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Physical properties
Hardness: 6.5 to 7 on the Mohs scale. Color: multicolored with distinct bands of brown, red, white, and tan. Luster: vitreous to waxy when polished. Crystal structure: microcrystalline (cryptocrystalline quartz). Cleavage: none.
Formation & geological history
Formed through the deposition of silica-rich groundwater in hollows or cavities of pre-existing rocks, often volcanic or sedimentary, accumulating in successive layers over geological time scales.
Uses & applications
Commonly used for ornamental carvings, decorative items, polished palm stones, and jewelry.
Geological facts
Agate has been used since antiquity for ornaments, seals, and healing talismans, frequently associated with balance and grounding.
Field identification & locations
Easily identified by its distinct concentric color banding and high hardness (scratches glass). Commonly sourced from Brazil, India, Madagascar, and the United States.
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