mineral

Tumbled peach agate

Microcrystalline quartz (SiO₂), chalcedony variety; likely agate

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; cream to peach with rusty-brown inclusions, polished waxy-to-glassy luster, and no visible cleavage. Agate is cryptocrystalline quartz, though this small opaque specimen’s exact variety cannot be confirmed visually.

Identified October 14, 2026More mineral →

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Physical properties

Formation & geological history

Silica-rich fluids deposited successive layers in rock cavities, later solidifying and being naturally or artificially rounded and polished. Agates formed in many geological periods, commonly in volcanic rocks.

Uses & applications

Used for beads, jewelry, ornaments, and lapidary crafts; agate is also used in precision components and decorative objects.

Geological facts

Agate’s fine quartz crystals are too small to distinguish individually without magnification; banding is common but not always visible.

Field identification & locations

Look for hardness, a smooth polish, and often translucent layered or banded patterns; agate occurs worldwide, including Brazil, Uruguay, India, and the western United States. This specimen’s pale color and speckles alone do not establish a precise identification.