gemstone
Agate
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, waxy to vitreous luster, banded color patterns, and a microcrystalline quartz structure with conchoidal fracture.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, waxy to vitreous luster, banded color patterns, and a microcrystalline quartz structure with conchoidal fracture.
Formation & geological history
Formed by the deposition of silica from groundwater in cavities of igneous and metamorphic rocks, typically over millions of years.
Uses & applications
Widely used in jewelry, ornamental carvings, decorative items, and precision instruments like mortars and pestles.
Geological facts
Agate is an ancient healing stone prized since Neolithic times and is the zodiac stone for Gemini.
Field identification & locations
Easily identified by its distinctive concentric color banding and waxy luster; found worldwide, particularly in Brazil, India, and the USA.
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