mineral
Dyed tumbled stone, likely chalcedony or quartz
Microcrystalline quartz (SiO₂), probably dyed magenta
AI-generated identification · may be incorrectHardness 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.
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Physical properties
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.
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.
