mineral
Tourmalinated Quartz
Silicon dioxide with sodium iron aluminum borosilicate (SiO2 + Na(Fe3+,Al)3Al6(BO3)3Si6O18(OH)4)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, transparent to translucent with black prismatic inclusions, vitreous luster, and hexagonal crystal system.
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Physical properties
Hardness of 7 on the Mohs scale, transparent to translucent with black prismatic inclusions, vitreous luster, and hexagonal crystal system.
Formation & geological history
Formed through hydrothermal crystallization in pegmatites and veins where quartz and tourmaline grow together simultaneously.
Uses & applications
Widely used in ornamental carvings, gemstone jewelry, and as a popular mineral specimen for collectors.
Geological facts
The black needles inside are typically schorl tourmaline. It is often regarded as a powerful protective stone in crystal healing.
Field identification & locations
Easily identified by contrasting black needle-like crystals embedded within clear or milky quartz. Found globally, notably in Brazil, Madagascar, and the USA.
