mineral

Tumbled green stone, likely aventurine

Green aventurine (quartz with fuchsite or other green inclusions), tentatively identified

AI-generated identification · may be incorrect

Opaque, dark green, smoothly polished and rounded, with a vitreous-to-waxy luster. Aventurine is mostly quartz (SiO₂), hardness about 6.5–7 Mohs, with no prominent cleavage; this photo does not show its usual glitter clearly, so identification is uncertain.

Identified October 15, 2026More mineral →

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Physical properties

Formation & geological history

If aventurine, it formed when quartz crystallized with fine green mica inclusions, typically in metamorphic or hydrothermal settings. The rounded shape is from human tumbling; the reported location near 52.4°N, 8.1°E does not establish its geological origin.

Uses & applications

Tumbled stones are used for jewelry, ornaments, and collecting; quartz-rich material also has industrial uses, though this small polished piece is mainly decorative.

Geological facts

Green aventurine is a variety of quartz prized for its color and occasional shimmering effect, called aventurescence.

Field identification & locations

Look for tiny reflective flecks and hardness sufficient to scratch glass; these can help distinguish it from softer green stones or glass. The photo alone cannot confirm aventurine, and a local find may instead be another green mineral or imported tumbled stone.