mineral
Dyed green howlite beads (likely)
Howlite, Ca₂B₅SiO₉(OH)₅, artificially dyed green
AI-generated identification · may be incorrectPolished beads with vivid green color and dark, web-like veining, a pattern typical of dyed howlite or magnesite. Howlite has Mohs hardness 3.5; the image does not reveal enough to determine luster or crystal structure reliably.
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Physical properties
Polished beads with vivid green color and dark, web-like veining, a pattern typical of dyed howlite or magnesite. Howlite has Mohs hardness 3.5; the image does not reveal enough to determine luster or crystal structure reliably.
Formation & geological history
Howlite forms as a borate mineral in evaporite deposits, commonly in arid regions; it is a natural geological material that has been cut, polished, and dyed. Its age depends on the deposit and cannot be determined from the image.
Uses & applications
Used for inexpensive jewelry and craft beads, often as a dyed imitation of turquoise.
Geological facts
Howlite is porous and readily accepts dyes; similar beads may instead be dyed magnesite, which can be difficult to distinguish visually.
Field identification & locations
The rounded beads and mottled green-black pattern suggest dyed howlite, but confirm by examining an undyed area or testing hardness and density. Natural howlite is notably found in California and Nova Scotia.
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