mineral
Yellow Quartz
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 7, vitreous luster, hexagonal crystal system, conchoidal fracture, and specific gravity of 2.65.
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Physical properties
Mohs hardness of 7, vitreous luster, hexagonal crystal system, conchoidal fracture, and specific gravity of 2.65.
Formation & geological history
Forms in hydrothermal veins and pegmatites through the precipitation of silica-rich fluids under high temperature and pressure.
Uses & applications
Used primarily in jewelry, ornamental carvings, and metaphysical collections.
Geological facts
Naturally yellow quartz gets its color from iron impurities or natural irradiation, though much commercial yellow quartz is heat-treated amethyst.
Field identification & locations
Identified by its yellow color, high hardness, and lack of cleavage; commonly found in Brazil, Madagascar, and the USA.
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Metamorphic
Limonite
FeO(OH)•nH2O
mineral
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