Quartz | Mohs 7 | Iron-bearing Silica | Metamorphic / Hydrothermal
Material Overview
Amethyst is a violet variety of quartz formed when iron impurities within silica-rich solutions are exposed to natural irradiation during crystal growth.
Its structural simplicity (SiO₂) hides remarkable chemical sensitivity to environmental conditions.
Geological Formation
Most commercial amethyst forms in volcanic geodes where silica-rich fluids crystallize inward over time. Iron content combined with radiation exposure determines color saturation.
Zoning within beads reflects uneven distribution during growth.
Geographic Variation
- Brazil: Lighter lavender tones
- Uruguay: Deep, saturated violet
- Zambia: Strong zoning, darker character
Mining & Preparation
Primarily open-pit geode extraction. Generally untreated, though heat can convert it to citrine.
Jewelry Performance
Durable. Holds polish. May fade with prolonged UV exposure.
Symbolism & Interpretation
Historically linked to clarity and restraint. Whether its steadiness is mineralogical or psychological, it consistently carries composure in design.
