mineral
White Howlite
Howlite (Ca2B5SiO9(OH)5)
AI-generated identification · may be incorrectHardness 3.5 on Mohs scale; opaque white with occasional dark brown or black web-like veining; sub-vitreous to dull luster; monoclinic crystal system.
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Physical properties
Hardness 3.5 on Mohs scale; opaque white with occasional dark brown or black web-like veining; sub-vitreous to dull luster; monoclinic crystal system.
Formation & geological history
Formed as an evaporite mineral in continental saline basins and sedimentary borate deposits.
Uses & applications
Commonly carved into beads, jewelry components, and ornamental objects, or dyed blue-green to imitate turquoise.
Geological facts
First discovered in 1868 in Nova Scotia by Canadian mineralogist Henry How, after whom it is named.
Field identification & locations
Identified by its soft, porous texture, chalky streak, and porcelain-like finish when polished; primarily sourced from California, USA, and Nova Scotia, Canada.
