mineral
Druzy Quartz on Matrix
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale); Color: White to colorless; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct; Specific Gravity: 2.65
- Hardness
- 7 (Mohs scale)
- Color
- White to colorless
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 (Mohs scale); Color: White to colorless; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct; Specific Gravity: 2.65
Formation & geological history
Formed through hydrothermal processes where silica-rich fluids permeate cavities or fractures in host rocks, crystallizing into tiny pointed crystals over millions of years.
Uses & applications
Primarily used in jewelry (as pendants or earrings), metaphysical collecting, and as decorative mineral specimens.
Geological facts
The term 'druzy' (or druse) refers to a coating of fine crystals on a rock surface. Quartz is the most common druzy mineral because it is highly resistant to chemical weathering.
Field identification & locations
Identifiable by the 'sparkle' effect caused by many tiny crystal faces reflecting light. Often found in geodes or lining the walls of veins in volcanic and sedimentary environments.
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock