gemstone
Tumbled Agate
Silicon Dioxide, SiO2 (Cryptocrystalline Quartz)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, waxy luster, conchoidal fracture, and displays characteristic microcrystalline banded patterns in various translucent earth tones.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, waxy luster, conchoidal fracture, and displays characteristic microcrystalline banded patterns in various translucent earth tones.
Formation & geological history
Formed by the deposition of silica from groundwater solutions in the cavities of ancient volcanic and metamorphic rocks over millions of years.
Uses & applications
Widely used for polished tumbled stones in jewelry, ornamental carvings, metaphysical practices, and lapidary collections.
Geological facts
Agate was highly valued in the ancient world as a talisman and for making carved seals; the name comes from the Achates River in Sicily.
Field identification & locations
Easily identified by its distinctive waxy luster, fine-grained microcrystalline texture, and hardness that scratches glass. Commonly sourced globally from volcanic regions.
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