metamorphic
Dyed Blue Quartzite
SiO2 (Silicon Dioxide) with artificial colorants
Hardness: 7 on Mohs scale; Color: unnaturally vibrant electric blue with darker dye concentrations in fractures; Luster: vitreous; Crystal structure: Trigonal/Hexagonal; Cleavage: none (conchoidal fracture).
- Hardness
- 7 on Mohs scale
- Luster
- vitreous
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Physical properties
Hardness: 7 on Mohs scale; Color: unnaturally vibrant electric blue with darker dye concentrations in fractures; Luster: vitreous; Crystal structure: Trigonal/Hexagonal; Cleavage: none (conchoidal fracture).
Formation & geological history
Formed via the metamorphism of quartz-rich sandstone subjected to high heat and pressure, causing quartz grains to recrystallize. This specific specimen has been tumble-polished and artificially dyed to achieve its bright color.
Uses & applications
Primarily used for decorative purposes, costume jewelry, healing crystals/metaphysical practices, and as aquarium gravel or landscaping stone.
Geological facts
Quartzite is so hard it can scratch glass and steel. Most bright blue stones of this shade are actually white quartzite or agate that has been dyed because natural blue minerals of this vibrance are rare and expensive.
Field identification & locations
Identify in the field by its sugary texture and hardness. To spot dyed specimens, look for pools of intense color gathered in the tiny cracks and veins of the stone, which do not occur naturally.
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