mineral

Tumbled purple stone, likely lepidolite or purple jasper

Lepidolite (K(Li,Al)₃(Si,Al)₄O₁₀(F,OH)₂) or quartz-rich purple jasper

AI-generated identification · may be incorrect

Opaque lavender-purple, fine-grained, dull to waxy luster, rounded by tumbling, with surface fractures. Lepidolite has Mohs hardness 2.5–3.5 and micaceous cleavage; jasper is harder, about 6.5–7, with no visible cleavage.

Identified August 14, 2026More mineral →

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Physical properties

Formation & geological history

Lepidolite forms in lithium-rich granite pegmatites during late-stage crystallization; purple jasper forms from silica-rich fluids replacing or cementing sediments. Exact age and identity cannot be determined from the image.

Uses & applications

Tumbled lepidolite is sold as a collector stone and ornamental material; jasper is used for carvings, cabochons, beads, and decorative objects.

Geological facts

The unusually soft-looking lavender color is more consistent with lepidolite, though dyed quartzite or jasper is also possible. A hardness test and examination of a fresh surface would distinguish them.

Field identification & locations

Common sources include Brazilian and Madagascan pegmatites for lepidolite and India, Brazil, Madagascar, and the United States for jasper. Check hardness: a steel knife may scratch lepidolite but should not scratch jasper or quartz.