mineral
Citrine
Silicon dioxide (Quartz variety), SiO2
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, yellow to brownish-orange color, vitreous luster, hexagonal crystal system, conchoidal fracture with no cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, yellow to brownish-orange color, vitreous luster, hexagonal crystal system, conchoidal fracture with no cleavage, specific gravity of 2.65.
Formation & geological history
Forms naturally through the hydrothermal growth of quartz with trace amounts of iron impurities or via the heat treatment of amethyst. Found globally in pegmatites and metamorphic rocks.
Uses & applications
Widely used as a popular gemstone in jewelry, decorative carvings, and sought after by crystal collectors.
Geological facts
Natural citrine is relatively rare; most commercial citrine is actually heat-treated amethyst or smoky quartz.
Field identification & locations
Identified by its distinct yellow coloration, lack of cleavage, and quartz crystal habit. Commonly sourced from Brazil, Madagascar, and the USA.
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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