Where is Amethyst found?
SiO2 (Quartz variety)
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Open the appAmethyst occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Amethyst
Brazil
Major producer, particularly from the state of Rio Grande do Sul, known for large geodes and cathedral-like formations.
Uruguay
Known for high-quality, deep purple amethyst, often found in basaltic geodes.
Zambia
Significant source of dark, intense purple amethyst.
Russia (Ural Mountains)
Historically famous for fine, deep purple amethyst, often with a reddish flash.
Canada (Thunder Bay, Ontario)
Known for distinctive reddish-purple amethyst.
United States (Arizona, North Carolina, Georgia, Maine, Pennsylvania)
Various localities produce amethyst, though generally not on the scale of South American or African deposits.
Collecting tips
- Look for Geodes and Vugs. Amethyst often forms in hollow cavities (geodes or vugs) within volcanic or sedimentary rocks. Look for rounded, weathered rock formations that might contain such cavities.
- Identify Host Rocks. Focus your search in areas with basalt flows, granitic intrusions, or areas known for hydrothermal activity and pegmatites.
- Check for Crystal Habits. Amethyst typically forms well-defined hexagonal prismatic crystals. Look for these characteristic shapes in rock outcrops or loose material.
- Observe Color and Luster. The distinctive purple color and vitreous luster are key identifiers. Be aware of color zoning.
- Hardness Test. Amethyst (quartz) has a Mohs hardness of 7, meaning it can scratch glass and steel. This helps differentiate it from softer purple minerals like fluorite (Mohs 4).
Quick Check
- Color:
- Purple to violet
- Luster:
- Vitreous (glassy)
- Streak:
- White
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