mineral
Quartz (Double-Terminated)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale), Color: Colorless to pale yellow (light citrine hue), Luster: Vitreous (glassy), Crystal Structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Colorless to pale yellow (light citrine hue), Luster: Vitreous (glassy), Crystal Structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
Formation & geological history
Formed from hydrothermal solutions or cooling magma in veins and pegmatites. This specific shape indicates it grew freely in a pocket or soft matrix, allowing facets to form at both ends.
Uses & applications
Used in electronics (piezoelectric properties), glassmaking, watchmaking, and widely as a jewelry gemstone or healing crystal specimen.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust. Double-terminated crystals like this one are highly prized by collectors for their energetic symmetry.
Field identification & locations
Identify by its hexagonal cross-section and its ability to scratch glass. Found worldwide, notably in Brazil, Arkansas (USA), and the Himalayas. Look for natural facets and internal inclusions or veils.
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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