mineral
Quartz (Druzy)
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale), Color: White to transparent, Luster: Vitreous/Glassy, Crystal Structure: Trigonal/Hexagonal, Cleavage: Indistinct, SG: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: White to transparent, Luster: Vitreous/Glassy, Crystal Structure: Trigonal/Hexagonal, Cleavage: Indistinct, SG: 2.65
Formation & geological history
Formed through the cooling of silica-rich hydrothermal solutions in rock cavities, pores, or fractures. This process can occur across various geological ages from Precambrian to recent times.
Uses & applications
Used in the manufacturing of glass and ceramics, as a component in electronic oscillators, and popular in jewelry (especially druzy settings) and metaphysical collecting.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. 'Druzy' refers to the tiny glittering crystals that form on the surface of another mineral or rock.
Field identification & locations
Identify by its hardness (it will scratch glass) and lack of cleavage. Often found near granite outcrops, in geodes, or within riverbeds as weathered remnants.
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
![Biotite Schist (Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]) — metamorphic](https://media.rock.id/9ca564b5-bc87-402b-965a-69b21f9aa6bf-thumbnail.jpg)
Biotite Schist
Biotite-rich Schist [K(Mg,Fe)3AlSi3O10(F,OH)2]
metamorphic