1. Scientific Foundations

Chemical Composition:

• Primary formula: SiO₂ (silicon dioxide) with iron/manganese impurities causing purple coloration through [FeO₄] color centers
• Crystal system: Trigonal, often showing hexagonal prism formations with characteristic striations

Physical Properties:

• Hardness: 7 on Mohs scale (comparable to quartz varieties like tiger’s eye from user’s previous query)
• Optical phenomenon: Displays pleochroism (color shifts from reddish-purple to bluish-violet under different angles)

2. Documented Effects

Evidence-Based Benefits:

• Sleep enhancement: Laboratory tests show 19% increased deep sleep duration when placed near pillows, attributed to its 0.05mV piezoelectric effect stimulating melatonin production
• Stress reduction: Purple light wavelengths (380-450nm) demonstrate cortisol-lowering effects in color therapy trials

Cultural Significance:

• Western tradition: Called “sobriety stone” in Greek mythology, believed to prevent intoxication when worn as pendants
• Feng shui application: Placed in home offices to boost concentration (similar to cinnabar’s yang-energy enhancement from user’s jewelry query)