mineral
Tourmaline in Quartz
Schorl (NaFe3Al6(Si6O18)(BO3)3(OH)4) in Quartz (SiO2)
AI-generated identification · may be incorrectHardness 7-7.5 on Mohs scale, featuring black prismatic crystals embedded in white to clear crystalline quartz with vitreous luster.
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Physical properties
Hardness 7-7.5 on Mohs scale, featuring black prismatic crystals embedded in white to clear crystalline quartz with vitreous luster.
Formation & geological history
Formed in hydrothermal veins and pegmatites through the cooling of mineral-rich fluids under high pressure.
Uses & applications
Prized by mineral collectors, used in ornamental lapidary objects, and sometimes cut into unique gemstone jewelry.
Geological facts
Tourmaline crystals often act as host indicators for pegmatitic evolution, and the contrast against white quartz makes it highly aesthetic.
Field identification & locations
Easily identified by the stark contrast of dark, striated prismatic tourmaline needles contrasting with translucent quartz. Found worldwide in pegmatite provinces.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous