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Quick answer: ametrine is a natural bicolor variety of quartz that combines amethyst (purple) and citrine (yellow to orange) in one crystal. It rates 7 on the Mohs scale, like other quartz. Nearly all natural gem ametrine has come from the Anahí mine in eastern Bolivia, and a lab-grown version has been made since the late twentieth century, so buyers should ask whether a stone is natural, synthetic or treated. The two colors come from iron in the quartz behaving differently in different growth zones. In crystal traditions ametrine stands for balance between calm and energy, though those meanings are not scientifically proven. Care for it as you would amethyst: avoid strong heat and long periods in direct sunlight because the purple can fade, and wipe it with a soft cloth or wash it gently in lukewarm soapy water.
Most crystals choose a color and stick with it. Ametrine does not. Look at a good piece and you will see a field of violet melting into gold, sometimes with a sharp line between the two and sometimes with a soft blend in the middle. It is one of the few gems that shows both of quartz’s best-known colors at once.
This guide explains what ametrine is, how it forms, where it is found, what it means in crystal practice and how to care for it. It also covers how to tell natural stones from lab-grown and treated ones. If you are new to stones, our crystal meanings guide on properties, care, cleansing and spotting fakes covers the basics that apply to every stone.
Sources: Gemological Institute of America (GIA) gem encyclopedia entries on ametrine, amethyst and citrine; Encyclopaedia Britannica entry on quartz; Mindat mineral database entry for quartz; Smithsonian National Museum of Natural History gem and mineral collection notes; geological descriptions of the Anahí mine in the Santa Cruz department of Bolivia; GIA research on synthetic ametrine. Metaphysical meanings come from crystal traditions and are not scientifically proven. This article is general information and not medical advice. Checked November 2026.
What Is Ametrine?
A two-in-one quartz
Ametrine is quartz (silicon dioxide) that contains both amethyst and citrine coloring in a single crystal. Amethyst is purple quartz, colored by iron and natural radiation. Citrine is yellow to orange quartz, also colored by iron, but in a different state. When the right conditions occur during growth, one crystal can contain zones of each color, and that is what gemologists call ametrine.
The name is a blend of the two words, amethyst and citrine, and it is sometimes called bolivianite in the trade, a reference to the country where most gem-quality stones are found. Sellers also use the trade name “trystine,” so a quick search of a listing may turn up several labels for the same stone.
Key physical properties
| Property | Ametrine |
|---|---|
| Mineral | Quartz (silicon dioxide) |
| Crystal system | Trigonal |
| Mohs hardness | 7 |
| Luster | Vitreous (glassy) |
| Color | Purple and golden yellow to orange in one crystal |
| Transparency | Transparent to translucent |
| Treatment | Usually natural; heat-treated and synthetic versions exist |
| Fracture | Conchoidal (shell-like) |
Why two colors?
Amethyst and citrine get their colors from iron atoms inside the crystal. In amethyst, iron is in a state that, with natural radiation, produces a purple tint. In citrine, iron is in another state that produces yellow to orange. Researchers explain ametrine by pointing to differences in how the crystal grew. Different growth sectors, called rhombohedral faces, take up iron in different ways, and temperature changes during growth can influence the oxidation state of iron. The result is a crystal with sharp, patchy or blended zones of purple and gold.
This is a good reminder that the “two stones in one” idea is not magical but geological, and the same quartz crystal can show both colors depending on the way it grew.
Where Ametrine Comes From
Bolivia and the Anahí mine
Gem-quality natural ametrine has come almost entirely from a single deposit, the Anahí mine in the Santa Cruz department of eastern Bolivia, near the border with Brazil. The mine is in a remote area and was little known outside the region until the twentieth century. Material from that deposit includes crystals, polished slabs and faceted gems, often with strong purple-gold contrast.
Small amounts of ametrine have been reported from other places, but the Bolivian deposit supplies most of what jewelers sell. Because it is a single source, the supply is not unlimited, though exact reserves are not public.
The Anahí legend
A popular story says that a Spanish conquistador married Anahí, a princess of the Ayoreo people, and received the mine as a dowry. When he presented gems to the Spanish court, the story goes, ametrine entered Europe as a gift to a queen. The tale is often repeated by sellers, but historians do not treat it as documented fact. It is more accurate to call it a local legend that explains the mine’s name than a record of how the gem became known.
Lab-grown ametrine
Ametrine can also be made in a laboratory. Hydrothermal growth methods, developed in the late twentieth century, produce quartz that includes both colors, and GIA has published research on identifying synthetic ametrine. Lab-grown stones are legitimate when they are labeled correctly, but they should not be sold as natural. Because the crystal growth in a lab is controlled, the stones sometimes show a very regular color zoning, which is a clue for gemologists.
Ametrine Meaning in Crystal Traditions
Crystal traditions link ametrine with the meanings of both of its halves. These ideas come from modern crystal practice, not from laboratory research, and they are best treated as personal symbolism. Common associations include:
- Balance between calm and energy
- Clear thinking combined with optimism
- Creativity and problem solving
- Harmony between logic and intuition
- Release of tension and mental clutter
- The solar plexus, third eye and crown chakras in chakra-based systems
Because it combines the calming reputation of amethyst with the warm, upbeat reputation of citrine, many people describe ametrine as a stone for bridging two moods or two parts of life.
Ways people use ametrine
- Keeping a small polished stone on a desk as a focus during work
- Wearing a pendant or earrings as an everyday reminder to stay balanced
- Placing a crystal point near a window or on a shelf for decoration
- Holding a palm stone during meditation or breathing exercises
- Pairing it with amethyst and citrine in a collection to show how the colors relate
None of these uses is a medical treatment. Ametrine will not cure stress, depression or insomnia, and professional care is the right route for persistent symptoms. For more on the two quartz stones that make up ametrine, see our guides to amethyst and citrine.
Caring for Ametrine
Quartz is one of the more forgiving stones, but the purple portion of ametrine does have a weakness.
Cleaning
- Wipe with a soft, damp cloth and dry it.
- Wash in lukewarm water with a drop of mild soap and a soft brush, then rinse and dry.
- Ultrasonic cleaners are generally safe for clean, untreated stones with no fractures, but skip them if the stone has cracks or fillings.
- Do not use steam cleaners or harsh chemicals.
Heat and sunlight
Strong heat can change the color of amethyst and citrine, and many amethysts fade with long exposure to direct sunlight. A stone left on a bright windowsill for years can lose its purple. Keep ametrine out of hot cars and away from strong, constant sun, and take jewelry off before using a sauna or hot tub.
Water
A quick rinse is fine, and quartz does not dissolve in water. Avoid hot-to-cold swings, which can stress fractures. See our overview of which crystals cannot go in water and why for a stone-by-stone list.
Storage and wear
At 7 on the Mohs scale, ametrine resists most daily wear, but it can scratch against diamond, sapphire and ruby. Store it separately in a soft pouch. Rings are fine for ordinary use, and a protective setting helps during heavy work.
Cleansing in crystal practice
If you cleanse stones as a ritual, gentle choices include moonlight, a bowl of clear quartz, smoke from dried herbs or sound. Avoid long sun exposure, since sunlight can fade the purple. Our walkthrough on how to cleanse crystals lists methods by stone type.
Ametrine Cuts and Jewelry
Cutters treat ametrine like a painting. Each rough crystal has its own pattern of purple and gold, and a good cutter orients the stone so the zones appear in an attractive way. Some of the most common approaches are:
- Bicolor step cuts. Rectangular or emerald cuts with a clear dividing line between purple and yellow show the contrast clearly, and they are popular for pendants and rings.
- Fantasy cuts. Carved or scissor-cut stones with curved facets sometimes blur the two colors into a gradient that looks like a sunset.
- Cabochons. Smooth, domed stones show a soft color blend and are often used in rings and bracelets.
- Points, slabs and spheres. Raw or polished crystals show the natural banding best and are favored by collectors and by people building a display.
When choosing a faceted stone, look for a color split you like and a stone that is clean enough that you can see through it. Very dark purple areas can look nearly black in dim light, and pale yellow areas can look almost colorless in small stones. Larger pieces usually show the contrast more clearly.
A few wearing notes: gold settings echo the citrine side, while white metals highlight the purple half. A simple setting, such as a bezel or low basket, lets the color play stand out and protects the edges. Pieces with strong color zoning can look different in each direction you turn them, which is part of their charm.
How to Spot a Fake or Misleading Ametrine
Ametrine is valuable enough that fakes and treated stones are common in the market.
- Lab-grown ametrine. The most important thing to know is that it exists and is often cheaper. Ask the seller whether the stone is natural or synthetic and get the answer in writing.
- Heat-treated amethyst. Heating some amethyst can turn parts of it yellow or orange. A seller who describes such a stone as natural ametrine without mentioning treatment is not being honest.
- Glass. Two-color glass can mimic ametrine. Glass often shows round bubbles or swirl marks under magnification and feels warmer to the touch than quartz.
- Dyed or coated quartz. Clear quartz can be dyed or coated to look purple or gold. The color may collect in cracks or flake off.
- Doublets and glued stones. Some pieces are made from a purple piece and a yellow piece glued together. Look at the stone from the side for a straight, sharp, unnatural dividing line.
- Too-perfect color. Perfectly even blocks of purple and gold at a very low price are more likely to be lab-made or fake.
Simple checks at home are not conclusive, since natural, lab-grown and treated stones can all look similar to the eye. A gem laboratory can use inclusion patterns and other tests to separate natural and synthetic ametrine. For a stone of significant value, ask for a report from an established laboratory.
Buying Ametrine
- Ask whether the stone is natural, heat-treated or lab-grown, and request that the answer be on the invoice.
- Ask about origin. Bolivia is the usual source of natural gem material.
- Look at the stone in daylight as well as shop lighting. Color zoning can look different under different light.
- Choose faceted pieces with a clear color line or soft blend that you like, since each stone is different.
- Buy from sellers who offer returns and give detailed descriptions.
Frequently Asked Questions
Is ametrine a real gemstone?
Yes. It is a natural variety of quartz that combines amethyst and citrine colors in one crystal. Lab-grown and treated versions also exist and should be labeled as such.
Where does ametrine come from?
Nearly all natural gem ametrine comes from the Anahí mine in the Santa Cruz department of Bolivia. Small amounts have been reported elsewhere.
Can ametrine fade in the sun?
The purple part can fade with long exposure to strong sunlight or heat, as with many amethysts. Keep it out of constant direct sun.
How can I tell if ametrine is natural?
It is difficult at home. Ask for a written statement of origin and treatment, and use a gem laboratory for valuable pieces, because synthetic ametrine can look very similar.
Is ametrine the same as amethyst?
No. Amethyst is purple quartz, while ametrine contains both purple and yellow to orange zones in one crystal. Both are quartz and share a hardness of 7.
What does ametrine mean spiritually?
Crystal traditions link it with balance, clear thinking and creativity. These meanings come from modern practice and are not scientifically proven.
