mineral
Tumbled, iron-stained quartz-rich pebble
Likely quartz/chalcedony with iron-oxide staining; exact rock type cannot be determined from the image
AI-generated identification · may be incorrectRounded and smooth, pale green-gray with rusty red-brown and dark patches. Quartz has Mohs hardness 7, vitreous to waxy luster, and no cleavage; the specimen’s grain and crystal structure are not clear in the photo.
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Physical properties
Rounded and smooth, pale green-gray with rusty red-brown and dark patches. Quartz has Mohs hardness 7, vitreous to waxy luster, and no cleavage; the specimen’s grain and crystal structure are not clear in the photo.
Formation & geological history
Likely a naturally weathered pebble, with iron oxides staining or coating parts of its surface, then smoothed by tumbling. Its original formation age and setting cannot be identified visually.
Uses & applications
Primarily a decorative or collectible tumbled stone; not identifiable as a specific industrial or jewelry-grade material.
Geological facts
The brown-red patches are consistent with iron oxides such as hematite or goethite, but color alone cannot confirm their identity.
Field identification & locations
Quartz-rich stones are widespread; check for glassy hardness and lack of cleavage, but the pictured staining makes precise field identification uncertain. A locality or fresh broken surface would help determine the rock type.
