mineral

Dyed howlite or magnesite turquoise imitation beads

Howlite: Ca₂B₅SiO₉(OH)₅; commonly dyed blue to resemble turquoise

AI-generated identification · may be incorrect

Opaque turquoise-blue, irregular tumbled beads with black/gray veining; dull to waxy luster, monoclinic crystal structure, Mohs hardness about 3–3.5, and specific gravity about 2.5–2.6. The visible porous texture and dark matrix strongly suggest dyed howlite, though dyed magnesite is also possible.

Identified September 22, 2026More mineral →

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Physical properties

Formation & geological history

Howlite forms as a borate mineral in evaporite-related deposits, commonly in arid sedimentary environments; magnesite forms through alteration of magnesium-rich rocks. The beads are human-cut and dyed, so their geological age cannot be determined from the image.

Uses & applications

Used for inexpensive jewelry and ornamental beads as a turquoise substitute; genuine turquoise is used in jewelry and carvings, while howlite itself has limited industrial use.

Geological facts

The material is often marketed inaccurately as “turquoise howlite.” Dye may concentrate in pores and cracks, producing unusually vivid blue color and dark vein contrast.

Field identification & locations

Likely identification clues are very bright uniform blue, soft porous surfaces, and gray-black spiderweb veining; a scratch test or acetone swab can damage the beads and should be avoided on jewelry. Common sources include California and Nevada for howlite, and Brazil, China, and Austria for magnesite.