Rock Identifier
White Agate (Silicon dioxide (Chalcedony), SiO2) — gemstone
gemstone

White Agate

Silicon dioxide (Chalcedony), SiO2

AI-generated identification · may be incorrect

Hardness of 6.5-7 on the Mohs scale, milky white color, waxy to vitreous luster, and microcrystalline structure with conchoidal fracture.

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Physical properties

Hardness of 6.5-7 on the Mohs scale, milky white color, waxy to vitreous luster, and microcrystalline structure with conchoidal fracture.

Formation & geological history

Forms by the deposition of silica from groundwater in cavities of igneous and sedimentary rocks, often over millions of years.

Uses & applications

Used extensively in jewelry, ornamental carvings, polished display specimens, and metaphysical practices.

Geological facts

Agate has been used since ancient times for amulets and seals due to its durability and smooth polishing capabilities.

Field identification & locations

Identified by its waxy luster, smooth tumbled shape, and high hardness that scratches glass. Commonly sourced globally including Brazil, India, and the USA.