mineral
Quartz (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: yellowish-brown to tan; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- yellowish-brown to tan
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: yellowish-brown to tan; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Formed in igneous, metamorphic, and sedimentary environments through hydrothermal activity or crystallization from magma. Color often comes from iron impurities or radiation.
Uses & applications
Used in glassmaking, electronics (piezoelectric properties), jewelry, and as a popular healing crystal or collector specimen.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Citrine is often referred to as the 'Success Stone'.
Field identification & locations
Identify by its ability to scratch glass and lack of cleavage. Found globally in riverbeds, mountains, and geodes.
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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
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary