gemstone

Orange agate (likely carnelian chalcedony)

Microcrystalline quartz, SiO₂; chalcedony colored by iron oxides

AI-generated identification · may be incorrect

Small translucent orange piece with curved banding and a waxy-to-vitreous luster, consistent with banded chalcedony. Hardness about 6.5–7 Mohs; trigonal quartz structure, with no visible cleavage and conchoidal fracture. Specific gravity about 2.6.

Identified September 30, 2026More gemstone →

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Physical properties

Formation & geological history

Silica-rich fluids deposited microscopic quartz in cavities or fractures, with iron producing the orange color; agate formation can span varied geological ages. The reported central Mexican location is broadly compatible with volcanic rocks and silica-filled cavities, though the photo alone cannot confirm locality.

Uses & applications

Used for beads, cabochons, carvings, and ornamental objects; small pieces are also collected.

Geological facts

Backlighting reveals translucency and internal bands, a useful clue for agate rather than opaque orange jasper.

Field identification & locations

Look for fine curved bands, translucency at thin edges, and a glassy/waxy surface; a scratch test or magnification can help distinguish chalcedony from glass or resin. Similar material occurs worldwide, especially in volcanic terrains.