mineral

White Agate (Tumbled)

Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony

Hardness: 6.5-7 on Mohs scale. Color: Milky white to translucent light gray. Luster: Waxy to vitreous. Crystal structure: Trigonal/Monoclinic (microscopic). Cleavage: None. Specific gravity: 2.58-2.64.

Hardness: 6
Color: Milky white to translucent light gray
Luster: Waxy to vitreous

Identified March 4, 2026More mineral →

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Physical properties

Formation & geological history

Formed in cavities (vugs) within volcanic rocks or ancient hydrothermal veins. Over millions of years, silica-rich groundwater deposits layers of chalcedony. This specific specimen appears to be tumbled and polished from a raw nodule.

Uses & applications

Used primarily in lapidary arts for jewelry, beads, and decorative carvings. Industrially used for precision pendulums, mortars and pestles due to its hardness and resistance to chemicals.

Geological facts

Agate is named after the Achates River in Sicily where it was first discovered. White Agate is often called the 'Peace Stone' in metaphysical circles and has been used in amulets for thousands of years.

Field identification & locations

Identify in the field by its conchoidal fracture (shell-like curves), waxy surface when broken, and translucency when held to light. Found globally, notably in Brazil, India, and the United States (Lake Superior region).

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