Amethyst
The most popular purple gemstone, once valued alongside diamonds.
Amethyst is the purple variety of quartz, colored by iron impurities and irradiation within the crystal lattice. Until the 19th century, amethyst was classified alongside diamond, ruby, sapphire, and emerald as a 'cardinal gem.' The discovery of massive deposits in Brazil brought prices down dramatically, but fine deep-purple amethyst remains a cornerstone of the colored gemstone market. Its affordability, wide availability in large sizes, and attractive color make it one of the most commercially important semi-precious stones. The finest material comes from Zambia, producing deeply saturated stones with red flashes.
What are the properties of amethyst?
| Hardness (Mohs) | 7 |
| Refractive Index | 1.544–1.553 |
| Specific Gravity | 2.65 |
| Crystal System | Trigonal |
| Chemical Formula | SiO₂ |
Color Varieties
Major Sources
Brazil · Zambia · Uruguay · Madagascar · South Korea · Russia (Siberian, historical)
What affects amethyst price?
Color Saturation
Deep, saturated purple with red flashes ('Siberian' quality) commands the highest prices. Medium purple is standard. Pale lavender is the most affordable.
Size
Amethyst is available in very large sizes at reasonable prices. Color quality matters more than carat weight for pricing.
Origin
Zambian amethyst is generally more valued than Brazilian for its deeper color. 'Siberian' amethyst (now a color grade, not necessarily from Siberia) is premium.
Clarity
Eye-clean is expected. Amethyst is a Type I gem. Clean material is the norm, not the exception.
How much does amethyst cost per carat?
Retail prices as of mid-2026. Actual cost depends on color, clarity, origin, and treatment.
| Quality | Price/ct | Notes |
|---|---|---|
| Commercial | $2–$10/ct | Pale, small stones, mass-market |
| Good quality | $10–$30/ct | Medium purple, clean, well-cut |
| Fine (deep purple) | $30–$50/ct | Rich saturated purple, eye-clean |
| Exceptional (Siberian) | $50–$100+/ct | Deep purple with red flashes, rare |
| Large display pieces | $5–$20/ct | Geode sections, cathedral specimens |
How to care for amethyst
Do
- Clean with warm soapy water and a soft brush
- Store away from direct sunlight
- Safe for everyday wear in most jewelry types
Don't
- Don't expose to prolonged direct sunlight. UV can cause color fading over time
- Avoid sudden temperature changes
- Don't use steam cleaners
Cleaning Method
Warm soapy water and soft brush. Ultrasonic is generally safe. Avoid steam and prolonged heat exposure.
How to buy amethyst
Focus on color, not size. You can get large, gorgeous amethysts for a fraction of what other purple stones cost.
Zambian amethyst with red flashes is the best value in the purple gemstone market.
Ametrine (natural bi-color amethyst/citrine) from Bolivia makes a unique and affordable collector's stone.
Avoid heat-treated amethyst sold as 'citrine' or 'heated citrine'. Natural citrine is much rarer.
For statement pieces, amethyst geodes and clusters are available at accessible prices and make stunning display items.
Did You Know?
The name comes from the Greek 'amethystos,' meaning 'not intoxicated.' Ancient Greeks believed it prevented drunkenness.
Before the discovery of Brazilian deposits, amethyst was as rare and expensive as ruby.
Heating amethyst to 400–500°C turns it yellow-orange (citrine) or green (prasiolite).
Frequently asked questions
How much is amethyst worth?
Faceted amethyst runs $2 to $100+ per carat at retail, as of mid-2026. Most jewelry-grade stones fall in the $10 to $50 range. Large geode sections and cathedral specimens price by piece rather than per carat, typically $5 to $20 per carat for display material.
Why is amethyst so cheap?
Massive deposits in Brazil, Uruguay, and Zambia flooded the market after the 19th century, collapsing prices that once rivaled ruby. Amethyst grows in large, clean crystals, so supply far outpaces demand. Fine deep-purple Siberian-grade material still commands premiums, but it represents a tiny fraction of total production.
Is amethyst durable enough for daily wear?
At 7 Mohs, amethyst handles everyday rings and pendants with reasonable care. It scratches more easily than sapphire or diamond and can fade with prolonged UV exposure. Avoid steam cleaning and store pieces away from direct sunlight when not worn.
What is the best amethyst color?
Deep, saturated purple with red flashes is the top grade, historically called Siberian quality regardless of actual origin. Medium purple is the commercial standard. Pale lavender (Rose de France) is the most affordable and works well in fashion jewelry where subtle color is the goal.
Amethyst vs tanzanite: which should I buy?
Amethyst is far more affordable, harder (7 vs 6.5 to 7 Mohs), and available in larger sizes. Tanzanite offers a unique blue-violet color found in only one location worldwide, with higher per-carat prices and more limited supply. Choose amethyst for budget-friendly purple jewelry; choose tanzanite when you want a rarer, more distinctive hue and accept softer durability.
Related Resources
Related Gemstones
Garnet
A family of gems spanning every color, not just the deep reds.
Spinel
The great imposter, historically mistaken for ruby and sapphire, now prized in its own right.
Tanzanite
Found in only one place on earth, a violet-blue stone rarer than diamond.
Tourmaline
The rainbow gem. No other mineral occurs in as many colors.
Glossary Terms
Last updated: 2026-08-12