mineral
Blue-dyed howlite beads (likely)
Howlite, Ca₂B₅SiO₉(OH)₅, commonly dyed blue to imitate turquoise
AI-generated identification · may be incorrectUsually white, opaque, porous, and chalky with Mohs hardness 3–3.5; polished beads have a glassy-to-waxy luster. The blue color and occasional pale veining are artificial; bead holes and uniform shaping indicate human processing.
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Physical properties
Usually white, opaque, porous, and chalky with Mohs hardness 3–3.5; polished beads have a glassy-to-waxy luster. The blue color and occasional pale veining are artificial; bead holes and uniform shaping indicate human processing.
Formation & geological history
Howlite forms as a borate mineral in evaporite-associated deposits, especially in arid regions; notable sources include California and Nova Scotia. Geological age varies by deposit, and the pictured beads are manufactured from mined material.
Uses & applications
Used for inexpensive jewelry, craft beads, and turquoise imitations; it has little industrial importance. Dyed howlite is generally valued as a decorative material rather than a gemstone.
Geological facts
Howlite readily accepts dye because of its porosity. It is often confused with dyed magnesite or reconstructed turquoise, which can look very similar.
Field identification & locations
Identify it by low hardness, light weight, porous texture, and dye concentrated around cracks and drill holes; a scratch or solvent test may damage the bead and should be avoided on finished jewelry. Commonly sold worldwide through bead and mineral markets.
