mineral
Dumortierite Quartz
Dumortierite in Quartz (SiO2 with Al7BO3(SiO4)3(O,OH)3)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale. Displays vibrant blue to violet-blue colors with a vitreous to silky luster and massive or fibrous crystal habit.
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Physical properties
Hardness of 7 on the Mohs scale. Displays vibrant blue to violet-blue colors with a vitreous to silky luster and massive or fibrous crystal habit.
Formation & geological history
Formed through regional metamorphism in boron-rich aluminum silicate rocks and pegmatites, often occurring as inclusions trapped within growing quartz crystals.
Uses & applications
Used primarily as an ornamental stone, for lapidary carvings, and as a popular collector specimen in jewelry.
Geological facts
Often mistaken for lapis lazuli or sodalite due to its intense blue coloration, but distinguished by its hardness and quartz matrix.
Field identification & locations
Identified easily by its striking denim-blue color embedded in transparent to milky quartz. Commonly sourced from Brazil, Madagascar, and the USA.
