Amethyst
Amethyst is a purple variety of quartz and is the traditional birthstone for February. It's prized for its beautiful purple color ranging from light lavender to deep violet.
Amethyst properties at a glance
| Type | Quartz Family |
|---|---|
| Chemical formula | SiO2 |
| Mohs hardness | 7 |
| Crystal system | hexagonal |
| Luster | vitreous |
| Streak | White |
| Cleavage | None |
| Fracture | Conchoidal |
| Specific gravity | 2.65 |
| Transparency | transparent |
| Common colors | Purple, Violet, Deep Purple, Lavender |
| Rarity | common |
Geology & background
Forms in geodes from silica-rich solutions. The purple color comes from iron impurities and natural irradiation.
Historically worn by royalty and clergy as a symbol of wisdom and purity.
How to identify Amethyst
- Check whether the specimen's color and texture match typical Amethyst examples.
- Photograph a fresh surface in natural light and avoid shadows, glare, or wet surfaces.
- Use hardness, streak, luster, grain size, and locality together; no single trait is enough for every specimen.
Where Amethyst is found
Amethyst is reported from multiple localities or geological settings. Exact locality should be verified from specimen provenance, maps, or field notes.
How much is Amethyst worth?
| Entry-level specimen | $10 |
|---|---|
| Typical collector specimen | $50 |
| Premium specimen | $500+ |
Value depends on size, condition, color, crystal quality, locality, rarity, preparation, and provenance. Treat this as educational guidance, not an appraisal.
Common uses
- Jewelry
- Decorative items
- Spiritual practices
Interesting facts
- Ancient Greeks believed it prevented intoxication
- The name comes from the Greek 'amethystos' meaning 'not drunk'
- Was once considered as valuable as diamonds
Care & safety
Treat Amethyst as a collector specimen unless hardness, cleavage, and fracture are confirmed.
Avoid inhaling dust. Do not cut, grind, or polish unknown specimens without eye protection and a properly rated respirator.
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