Description
Smoky quartz
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It’s a variety of quartz (SiO₂).
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The smoky color comes from natural radiation acting on trace aluminum in the crystal lattice.
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The radiation usually comes from nearby radioactive minerals in granites or pegmatites.
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Color intensity depends on radiation dose and aluminum content.
Elestial (a.k.a. skeletal or cathedral quartz)
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“Elestial” isn’t a formal mineral species term—it describes a growth habit.
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Forms under rapid, fluctuating growth conditions, often when:
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Temperature or pressure changes quickly
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Silica-rich fluids pulse in and out
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Space for crystal growth is limited
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Results in:
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Stepped, etched, layered crystal faces
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Multiple terminations
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Complex, almost “architectural” surfaces
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Geological environment
Smoky elestial quartz typically forms in:
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Granitic pegmatites
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Hydrothermal veins
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Late-stage magmatic systems where:
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Fluids are silica-rich
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Volatiles (H₂O, F, B) are abundant
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Crystals grow fast, stop, dissolve slightly, then regrow
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Why smoky + elestial together?
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Pegmatites provide:
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Aluminum for smokiness
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Radiation sources
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Rapid, unstable growth conditions → elestial structure
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So the two features often co-occur in places like:
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Brazil
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Madagascar
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Colorado (USA)
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Switzerland (Alpine veins)
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