mineral
Dumortierite in Quartz
Dumortierite (Al7BO3(SiO4)3O3) included in Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, displays blue to violet needle-like inclusions within a transparent to translucent quartz matrix.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, displays blue to violet needle-like inclusions within a transparent to translucent quartz matrix.
Formation & geological history
Formed through the hydrothermal alteration of aluminum-rich rocks in pegmatites and metamorphic environments.
Uses & applications
Used primarily in lapidary arts, gemstone carving, ornamental jewelry, and as a raw material in high-grade porcelain manufacturing.
Geological facts
Often mistaken for sodalite or lazurite, dumortierite is named after the French paleontologist Eugène Dumortier.
Field identification & locations
Identified easily by distinct denim-blue to indigo fibrous clusters embedded inside clear or milky quartz. Found globally in Brazil, Madagascar, and the USA.
