mineral
White Howlite
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
AI-generated identification · may be incorrectHardness of 3.5 on the Mohs scale, opaque white to milky color with distinctive dark grey or black web-like veins, and a vitreous to sub-vitreous luster.
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Physical properties
Hardness of 3.5 on the Mohs scale, opaque white to milky color with distinctive dark grey or black web-like veins, and a vitreous to sub-vitreous luster.
Formation & geological history
Forms as irregular nodules in evaporite deposits, primarily created through the precipitation of boron and calcium-rich minerals in saline lakes.
Uses & applications
Widely used as a tumbled gemstone, in beaded jewelry, and frequently dyed to imitate turquoise or red coral.
Geological facts
Discovered in Nova Scotia in 1868 by Henry How, this mineral is often carved into ornamental figures due to its soft nature.
Field identification & locations
Identified easily by its low hardness, white color, and characteristic dark veining. It is commonly sourced from Nova Scotia, the USA, and South Africa.
