1st - Gold 
January 
February 
March 
April 
May 
June 
July 
August 
September 
October 
November 
December 
Capricorn - Garnet 
Aquarius - Amethyst 
Pisces - Aquamarine 
Aries - Diamond 
Taurus - Emerald 
Gemini - Pearl 
Cancer - Ruby 
Leo - Peridot 
Virgo - Blue Sapphire 
Libra - Opal 
Scorpio - Topaz 
Sagittarius - Tanzanite 
Ametrine
Buyer’s Guide
Quality, Composition, Colour & Value Explained
Discover how colour, clarity, treatments and cut influence ametrine value, and learn what truly determines quality before choosing your ideal bi-colour gemstone.
A complete professional Ametrine Buyer’s Guide to understanding this gemstone’s quality, origin, treatments and value factors before purchasing.
Ametrine Meaning, History & Symbolism
Origins and Historical Use
Ametrine is a unique gemstone that naturally combines two varieties of quartz: amethyst and citrine. This striking purple-and-gold gemstone is relatively rare in nature and has fascinated collectors and jewellers for centuries.
The most famous historical account of ametrine dates back to the 17th century when Spanish conquistadors received the gemstone as a gift from the Bolivian mine known today as the Anahí Mine. From there it was introduced to Europe, where its unusual colour zoning quickly attracted attention among gem collectors and royal jewellers.
Ancient Beliefs and Spiritual Energy
Because ametrine contains both amethyst and citrine within the same crystal, many traditions associate it with the combined energies of these two gemstones. Amethyst has historically symbolised clarity and spiritual awareness, while citrine has been linked to prosperity and positive energy.
Together, ametrine is believed to encourage balance between emotional calm and creative motivation. It is often considered a stone of harmony, helping to bring clarity of thought while encouraging optimism and confidence.
Modern Symbolism and Collectibility
Today ametrine is admired for its natural bi-colour appearance and distinctive visual contrast. Well-cut stones display a dramatic transition between purple and golden hues, making each gemstone unique.
Collectors value high-quality ametrine for its strong colour zoning and transparency, while jewellery designers appreciate the gemstone’s versatility and affordability. Its unusual appearance and natural rarity continue to make it an intriguing addition to gemstone collections worldwide.
Ametrine Properties & Composition
Explore Ametrine’s Hardness, Lustre, Transparency, Refractive Index and Specific Gravity.
Understanding ametrine’s gemological properties helps determine durability, brilliance and suitability for daily wear.
Colour Range
Ametrine occurs in bi-colour combinations: Purple and golden yellow with varying intensity. The most desirable stones show a clear, well-defined separation of colours with strong saturation in both hues.
Chemical Formula
Ametrine has the SiO₂ chemical formula, composed primarily of silicon and oxygen. Its dual-colour characteristic is caused by differential iron oxidation within the crystal structure.
Composition
Silicon & Oxygen – trace elements (iron) influence the purple and yellow zones.
Refractive Index
1.544 – 1.553, producing brilliance and light dispersion typical of quartz.
Lustre
Vitreous, providing clear glass-like sparkle.
Moh's Hardness & Durability
Ametrine has a Mohs hardness of 7, making it suitable for most jewellery types including rings and pendants. Proper protective settings are recommended to prevent chipping along natural inclusions.
Crystal System
Its crystal system is hexagonal, forming elongated prismatic crystals, often with excellent clarity.
Transparency
Transparent to translucent, with high-quality ametrine typically eye-clean.
Mineral Family
Ametrine belongs to the quartz (silicate) mineral family.
Specific Gravity
2.65, typical of quartz gemstones.
Ametrine Origin, Treatment & Care
Ametrine is naturally bi-colour quartz, predominantly sourced from Bolivia. Understanding its origin and treatment is crucial for assessing value. With proper care, including gentle cleaning and avoiding harsh chemicals, ametrine maintains its beauty and durability for everyday jewellery use.
Major Origins
The most significant source of natural ametrine is the Anahí mine in Bolivia. Small deposits are also found in Brazil, but Bolivian ametrine remains the benchmark for quality, especially stones with well-defined colour zoning.
Treatments
Most ametrine on the market is natural. Heat treatment or irradiation is rarely used and should be disclosed. The value of ametrine largely depends on the natural intensity and separation of its purple and yellow zones.
Care and Cleaning
Avoid ultrasonic cleaners and harsh chemicals. Clean gently with warm water, mild soap, and a soft brush. Store separately from harder stones to prevent scratching or chipping.
How Ametrine Quality & Value Are Determined
Understanding how Ametrine is graded allows buyers to compare gemstones with confidence. Like other fine quartz varieties, value is determined by four main factors: colour, clarity, cut, and carat weight. A high-quality ametrine achieves harmony between its two colours while displaying strong clarity and precise cutting.
Ametrine Colour and Inclusion Quality
Colour is the most critical factor in determining ametrine value. The best stones show a vivid purple and golden yellow with a clean boundary between hues. Key considerations include:
- Even colour saturation in both purple and yellow zones
- Clear separation between colours
- No dull or muddy areas
- Strong light reflection and brightness
Stones with washed-out colours or poorly defined boundaries are less desirable. Top-quality ametrine shows vibrant, contrasting zones that enhance its unique bi-colour appearance.
Ametrine Clarity Explained
Ametrine is typically expected to have excellent clarity. High-value stones are:
- Eye-clean (no visible inclusions without magnification)
- Free from surface fractures or scratches
- Transparent with strong light transmission
Inclusions can reduce brilliance and distract from the striking colour contrast.
Ametrine Cut and Pattern Orientation
Cut affects both brilliance and the display of bi-colour patterns. Important cut considerations include:
- Precision in facet alignment
- Symmetry and proportion
- Enhancing colour contrast
- Smooth, even polish
Well-cut ametrine maximises light reflection and presents the colour zones in the most visually appealing manner.
Ametrine Carat Weight and Size Impact
Larger ametrine stones are rarer and command higher prices when colour and clarity are strong. When comparing stones:
- Smaller, vibrant stones may be more valuable than larger, dull stones
- Larger stones should maintain clear colour separation
- Well-cut medium-to-large stones typically attract premium prices
The Balance of the Four Factors
True value is determined by how colour, clarity, cut, and carat weight work together.
A premium ametrine gemstone should display:
- Eye-clean clarity
- Precise, symmetrical cutting
- Vivid purple and golden yellow colours
- Proportional size with strong brilliance
When these factors align, ametrine becomes a visually stunning and unique gemstone, prized for both jewellery and collectors.
Ametrine Price Per Carat
Ametrine is rarer than single-colour quartz varieties and its price increases with size, clarity, and intensity of colour. Stones under 1 carat are accessible, while larger, high-quality stones attract strong demand.
Estimated Average International Ametrine Prices (Good Quality) – Per Carat
| Weight | ZAR | USD | EUR | JPY | GBP | AUD | CAD | CHF | CNY | HKD | NZD | Market Signal |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Under 1 carat | Size is widely available | |||||||||||
| 1 - 2 carat | Increasingly popular | |||||||||||
| 2 - 3 carats | Strong demand | |||||||||||
| 3 - 4 carats | Remain desirable | |||||||||||
| 4 - 6 carats | Scarcer in larger sizes | |||||||||||
| 6 - 8 carats | Exceptional stones |
Ametrine FAQs
What is ametrine?
Ametrine is a naturally occurring quartz gemstone that combines amethyst (purple) and citrine (yellow) within a single crystal.
Where does ametrine come from?
The finest natural ametrine is sourced from the Anahí mine in Bolivia, with minor deposits in Brazil.
Are ametrine gemstones treated?
Most ametrine is natural. Rarely, treatment such as heat or irradiation is applied and should always be disclosed by reputable dealers.
Why does ametrine have two colours?
The bi-colour effect occurs due to different oxidation states of iron within the crystal during formation, producing purple and yellow zones.
How should I care for ametrine jewellery?
Avoid harsh chemicals and ultrasonic cleaners. Clean gently with warm water, mild soap, and a soft brush. Store separately to prevent scratches.
What factors determine ametrine value?
Colour contrast, clarity, cut, and carat weight are the main factors. The clearer the colour separation and higher the clarity, the more valuable the gemstone.
Buy With Confidence
Professionally inspected gemstones
Full transparency on treatments
Worldwide shipping
Secure checkout
Ready to own the beauty of
AMETRINE?
Now that you understand the history, symbolism and quality factors behind ametrine, you can secure your own dual-colour gemstone. Admired for its striking purple and golden hues, ametrine offers unique elegance and visual intrigue. Ideal for rings, pendants, and bespoke jewellery designs, ametrine combines rarity, beauty, and versatility — a sophisticated addition to any gemstone collection.
Dual Harmony
Balanced Energy
Distinctive Beauty
COMPARE GEMSTONES WITH CONFIDENCE
Gemstone Comparison Guides
Choosing between two beautiful gemstones can be challenging. Our professional Gemstone Comparison Guides help you clearly understand the differences between popular gemstones so you can make a confident and informed choice.
Each comparison explores the key factors that influence gemstone quality and value, including colour, clarity, durability, rarity and typical treatments. You will also learn how similar-looking gemstones differ in appearance, composition, hardness and more.
HERE IS ALL THE PROFESSIONAL INFORMATION YOU NEED
Gemstone Buyer's Guides
Buying a gemstone should be exciting — but understanding quality, rarity and value is essential before making the right choice. Our professional Gemstone Buyer’s Guides help you understand how colour, clarity, cut and treatments influence the beauty and value of different gemstones.
Each guide explains the key quality factors used by gemologists, including gemstone composition, colour grading, natural inclusions, treatments and origin. You will also learn how these factors affect rarity, durability and market value.
Beryl Family
Feldspar Gemstones
Pyroxene Gemstones
Spodumene Family
Chalcedony & Agate
Quartz Gemstones
Amethyst
Ametrine
Citrine
Prasiolite
Quartz
Rose Quartz
Rutile Quartz
Smoky Quartz
Rare & Collector Gemstones
Apatite
Chrysoberyl
Clinozoisite
Fluorite
Grandidierite
Iolite
Jade
Kyanite
Lapis Lazuli
Phosphosiderite
Prehnite
Serendibite
Sillimanite
Sphene
Sugilite
Vesuvianite