Ametrine Gemstone Information
About Ametrine - History and Introduction
Ametrine is a color-zoned variety of macrocrystalline quartz. It is sometimes referred to as trystine and is a natural bicolor combination of amethyst and citrine. Color band combinations in ametrine can range from pale-violet to deep-purple and from pale-yellow to gold-brown. Ametrine's color split is rather abrupt and is not a smooth blend of colors. Both the violet and yellow colors found in ametrine are from traces of iron. The only difference between amethyst, citrine and ametrine is the level of oxidized iron impurities in the visible color-zone bands. All three gemstones obtain their color from iron and all three varieties have a silicon dioxide chemical composition.
Identifying Ametrine Back to Top
Ametrine comes in bands of yellow and purple. It is easily identified by its unique bicoloring. Since it has a limited color range, it can easily be distinguished from other bicolored stones. Ametrine typically exhibits an abrupt color transition from purple to yellow, lacking any smooth color band transitions. Ametrine colors typically only reach a medium level of saturation of color, which means that most ametrine specimens are not very vivid or intense. Some synthetic or lab-grown ametrine can have extremely bright, vivid and intense colors and since this is not normal for ametrine, the authenticity of such stones should be questioned. In addition, ametrine is a variety of quartz, so it can be easily scratched by harder materials, such as sapphire and spinel. Simple scratch tests can distinguish ametrine quartz from other gemstone types.
Ametrine Origin and Gemstone Sources Back to Top
The Anahi Mine, located in Bolivia is the world's largest source for precious ametrine. The mine became famous in the 17th century when a Spanish conquistador received an ametrine stone as a gift. He had received the gift when he married a princess from the Ayoreos tribe by the name of Anahi from Bolivia. Ametrine was introduced to the rest of Europe when the conquistador presented the stone to the Spanish queen. Currently, the mine is operated by Minerales y Metales del Oriente. Although this source has been known to Bolivian natives for hundred of years, it has only been worked at a commercial level since the 1980s. There are also other ametrine deposits in Brazil (Rio Grande de Sul).
Buying Ametrine and Determining its Gemstone Value Back to Top
Ametrine Gemological Properties: Back to Top
Ametrine Gemstone Varieties or other Similar Gemstones: Back to Top
As a member of the quartz group of gemstones, there are several varieties of related gemstones. The quartz group is one of the most abundant mineral groups on earth, second only to feldspar. There are many varieties and trade names, many of which are locality based. There are two main branches of quartz: Cryptocrystalline quartz and macrocrystalline quartz.
Ametrine Gemstone Mythology, Metaphysical and Alternative Crystal Healing Powers Back to Top
Since ametrine is the bicolor union of both amethyst and citrine, ametrine combines the powers of both. Therefore ametrine can be the birthstone for those born in February and November. Ametrine is a planetary stone for both Uranus and Neptune, and it can represent the astrological signs of both Pisces and Cancer.
Ametrine Gemstone and Jewelry Design Ideas Back to Top
Bicolor ametrine gemstones are ideal for any gemstone jewelry, including daily-wear ametrine rings -- why? Because they are both durable and hard. Ametrine gems are best used in open settings because they have excellent transparency. Closed settings will not allow light to properly pass through, making the stone appear dark. Ametrine makes beautiful pendants, necklaces, brooches and rings. Some ametrines are sought after for jewelry because they are uniquely bicolored. Ametrine is very popular due to a wide variety of sizes, shapes and cutting-styles available. Bicolor ametrine is the most popular two-toned gemstone on the market today, followed by bicolor tourmaline.
Note: Buy colored gemstones by size and not by carat weight. Colored stones vary in size-to-weight ratio. Some stones are larger and others are smaller than diamonds by weight in comparison.
Ametrine Gemstone and Jewelry Care and Cleaning Back to Top
Ametrine is very durable. It can easily be cleaned with a mild soap and warm water. Wipe down ametrine using a soft cloth or toothbrush. Although ametrine is relatively hard and quite durable, there are other gem types capable of scratching ametrine. Take caution by not wearing or storing other gems near ametrine, especially when engaging in physical activities. As with almost all colored stones, harsh chemicals are not recommended. Avoid overexposure to extreme heat, because heat can cause permanent damage to ametrine color. Ametrine can be stored wrapped in a soft cloth or inside a fabric-lined box. Ametrine should be stored separately from other gems, regardless of whether they are harder or softer.
- First Published: August-12-2006
- Last Updated: May-25-2018
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