mineral

Tumbled pale chalcedony pebble

Chalcedony (microcrystalline quartz, SiO₂); exact variety uncertain

AI-generated identification · may be incorrect

Cream to honey-colored, smooth and rounded with dark inclusions; typically waxy to dull luster, Mohs hardness 6.5–7, trigonal quartz structure, and no cleavage. The image does not show enough detail to determine specific gravity or identify the inclusions.

Identified October 6, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed as silica deposited in cavities or fractures, then naturally water-worn or mechanically tumbled; chalcedony occurs in rocks of many ages. The pebble’s source and geological age cannot be established from the image.

Uses & applications

Commonly used for lapidary carving, beads, cabochons, and decorative specimens; this small piece appears mainly suitable for collecting or craft use.

Geological facts

Chalcedony is a compact aggregate of extremely fine quartz crystals, so individual crystals are generally invisible without magnification.

Field identification & locations

Look for a hard, smooth surface and waxy luster; quartz should resist scratching by a steel blade. Similar pale pebbles occur in river and beach gravels worldwide, but visual identification alone cannot confirm the variety.