mineral
Dumortierite in Quartz
Dumortierite (Al7BO3(SiO4)3O3) enclosed in Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale. Displays vibrant blue to violet-blue fibrous inclusions within a translucent quartz matrix, with a vitreous to silky luster.
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Physical properties
Hardness of 7 on the Mohs scale. Displays vibrant blue to violet-blue fibrous inclusions within a translucent quartz matrix, with a vitreous to silky luster.
Formation & geological history
Forms through hydrothermal alteration and regional metamorphism in aluminum-rich pegmatites and metamorphic rocks.
Uses & applications
Used primarily as a semi-precious gemstone in cabochons, carvings, and beaded jewelry, as well as a collector's mineral.
Geological facts
Dumortierite is often mistaken for lapis lazuli or sodalite, but it is actually a distinct borosilicate mineral.
Field identification & locations
Identify by its rich denim-blue color and inclusion patterns inside hard quartz. Commonly sourced from Brazil, Madagascar, and the USA.
