mineral

Dyed tumbled stone, likely chalcedony or quartz

Microcrystalline quartz (SiO₂), probably dyed magenta

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; vivid translucent magenta-purple color, vitreous/waxy luster, no visible cleavage, and irregular conchoidal fracture. The highly uniform fluorescent color and rounded polish strongly suggest artificial dyeing.

Identified August 21, 2026More mineral →

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Physical properties

Formation & geological history

The underlying chalcedony or quartz formed from silica-rich groundwater filling cavities or fractures, commonly during volcanic activity; its geological age depends on the source deposit. It was later cut, tumbled, polished, and dyed by humans.

Uses & applications

Used as an inexpensive decorative stone, craft material, paperweight, or novelty collectible; it has little jewelry value unless the color is natural and the material is confirmed as amethyst or agate.

Geological facts

This appearance is commonly marketed as dyed agate, chalcedony, or “dragon vein” stone, though the specimen may also be dyed quartzite. Dye often concentrates in pores, pits, and fractures.

Field identification & locations

Inspect pits and cracks for color concentration, test hardness against glass, and check whether the color looks unnaturally uniform; a gemological test is needed for definitive identification. Similar material is widely sold from Brazil, Uruguay, India, China, and Madagascar.