mineral

Unidentified tumbled translucent stone

Possibly quartz/chalcedony; exact identification requires hardness and diagnostic testing

AI-generated identification · may be incorrect

Gray-green translucent body with uneven surface, vitreous to waxy luster, and apparent conchoidal fractures; likely Mohs hardness about 6.5–7, with no visible cleavage. Small reddish inclusions may be iron oxides or another mineral.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Likely a naturally silicified stone or tumbled quartz-bearing material formed in a hydrothermal vein or silica-rich cavity; geological age cannot be determined from the image.

Uses & applications

Common quartz or chalcedony is used for carvings, lapidary objects, aggregates, and decorative stones; quality translucent material may be used in cabochons. Collector value is modest unless clarity, color, or pattern is exceptional.

Geological facts

Quartz-rich stones commonly show conchoidal fracture and resist scratching. The reddish spots are consistent with iron staining, but could also indicate jasper or included hematite.

Field identification & locations

Commonly found in river gravels and silica-rich veins worldwide. Test with a steel file or quartz reference, inspect translucency under strong light, and use streak, specific gravity, and crystal examination for confirmation.