mineral

Light-colored agate (likely chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); exact variety is uncertain from the image

AI-generated identification · may be incorrect

The specimen appears cream-white to pale tan with a waxy luster and smooth, possibly polished surface. Chalcedony has Mohs hardness 6.5–7, a trigonal quartz structure at microscopic scale, and no distinct cleavage; specific gravity is about 2.6.

Identified September 23, 2026More mineral →

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Physical properties

Formation & geological history

Chalcedony forms as silica-rich fluids fill cavities and fractures, commonly in volcanic rocks. The image does not reveal enough detail to determine its age or exact formation setting.

Uses & applications

Used for beads, cabochons, carvings, and ornamental objects; agate varieties are also collected.

Geological facts

Agate is a banded variety of chalcedony, but visible banding is not clear here, so a more specific identification is not reliable.

Field identification & locations

Look for waxy luster, hardness sufficient to scratch glass, and conchoidal fracture; agate commonly occurs in volcanic cavities worldwide. The photo suggests a light-colored polished or naturally smooth piece, but does not show diagnostic internal structure.