mineral
Quartz Druzy (Quartz Druse)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, vitreous (glassy) luster, trigonal/hexagonal crystal system, transparent to translucent colorless or white crystals, no cleavage, conchoidal fracture.
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Physical properties
Hardness of 7 on Mohs scale, vitreous (glassy) luster, trigonal/hexagonal crystal system, transparent to translucent colorless or white crystals, no cleavage, conchoidal fracture.
Formation & geological history
Formed when mineral-bearing hydrothermal fluids seep into cavities, fractures, or geodes within parent rock. As the solution cools and evaporates, tiny silica crystals precipitate, forming a sparkling crust or lining.
Uses & applications
Popular among crystal collectors, used in wire-wrapped jewelry, decorative items, and metaphysical practices.
Geological facts
The word druzy refers to a coating of fine crystals on a rock fracture or vein surface or within a geode. Druzy quartz is known for its sparkling effect caused by hundreds of tiny quartz crystal faces reflecting light.
Field identification & locations
Identified by tiny sparkling crystal terminations coating a cavity or matrix, which cannot be scratched by a steel nail (Mohs 7). Commonly found in Brazil, Uruguay, Madagascar, and the United States (e.g., Missouri, Iowa).
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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