mineral
Quartz with Tourmaline
Silicon Dioxide with complex boro-silicate (SiO2 + Na(Fe3+)3Al6(BO33Si6O18(OH)4)
AI-generated identification · may be incorrectHardness 7 on the Mohs scale, color ranges from clear/white quartz with dark green to black tourmaline needles, vitreous luster, hexagonal crystal system, conchoidal fracture.
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Physical properties
Hardness 7 on the Mohs scale, color ranges from clear/white quartz with dark green to black tourmaline needles, vitreous luster, hexagonal crystal system, conchoidal fracture.
Formation & geological history
Formed in hydrothermal veins and pegmatites through crystallization from silica-rich fluids and boron-bearing melts deep within the Earth's crust.
Uses & applications
Used in gemstone collection, metaphysical practices, and decorative carvings due to the striking contrast between the minerals.
Geological facts
The contrasting dark tourmaline inclusions inside clear or milky quartz are often referred to as turmalinated quartz.
Field identification & locations
Easily identified by the stark visual contrast of dark acicular crystals embedded within a translucent quartz matrix. Found globally, notably in Brazil and the USA.
