mineral

Tumbled amber-brown quartz (probable smoky quartz or carnelian)

Quartz, SiO₂; color may reflect iron impurities or irradiation

AI-generated identification · may be incorrect

Small rounded, polished translucent brown-orange piece with vitreous-to-waxy luster. Quartz hardness is Mohs 7, no obvious cleavage, hexagonal crystal structure, and specific gravity about 2.65.

Identified September 22, 2026More mineral →

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Physical properties

Small rounded, polished translucent brown-orange piece with vitreous-to-waxy luster. Quartz hardness is Mohs 7, no obvious cleavage, hexagonal crystal structure, and specific gravity about 2.65.

Formation & geological history

Quartz forms in igneous, hydrothermal, and metamorphic settings; brown varieties commonly gain color from irradiation, iron, or inclusions. The rounded shape indicates human tumbling or natural abrasion; age cannot be determined visually.

Uses & applications

Commonly sold as a lapidary stone, ornamental pebble, or inexpensive jewelry material. Typical value is about $1–$10; unusually clear, attractive material may reach $20–$50.

Geological facts

The image is too small and softly lit for secure separation from carnelian, jasper, or even brown glass. Quartz should scratch ordinary window glass, while glass may show bubbles or flow-like swirls.

Field identification & locations

Likely identification: tumbled smoky quartz or iron-stained quartz; carnelian is a regional alternative if the piece is more opaque orange-red. Quartz and chalcedony are common in Pacific Northwest gravels near 47.3°N, 122.5°W.