mineral
Tourmalinated Quartz with Yellow Mica
Silicon dioxide with complex boro-silicate and sheet silicates (SiO2 + Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 + KAl2(AlSi3O10)(OH)2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale for quartz; vitreous luster; transparent to opaque with clear, yellow, and black coloration; hexagonal crystal system with no distinct cleavage.
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Physical properties
Hardness of 7 on the Mohs scale for quartz; vitreous luster; transparent to opaque with clear, yellow, and black coloration; hexagonal crystal system with no distinct cleavage.
Formation & geological history
Formed in hydrothermal veins and pegmatites through the crystallization of silica-rich magma fluids containing boron and lithium over millions of years.
Uses & applications
Primarily valued as a decorative collector specimen, used in lapidary arts, and occasionally fashioned into jewelry.
Geological facts
The striking contrast between dark tourmaline needles and transparent quartz makes this a popular specimen among mineral enthusiasts worldwide.
Field identification & locations
Easily identified by the distinctive black prismatic tourmaline inclusions embedded within the quartz matrix; commonly sourced from Brazil, Madagascar, and the USA.
