What Is Ametrine?

Ametrine is a form of quartz that is mined, cut and polished for use in jewelry. Its most interesting and recognizable trait is that it is a bi-color stone. It is the rarest form of quartz, and therefore, also the most expensive. However, it costs much less than precious gemstones such as sapphire, emerald or diamond. Ametrine is relatively new to the jewelry market, having been introduced commercially in 1980.

Identification

As its name suggests, ametrine is part amethyst and part citrine, both of which are forms of quartz. It is purple (amethyst) and yellow-gold (citrine) in color. The mineral, iron, located in tiny amounts inside the quartz is what gives ametrine its bi-color. Citrine contains more iron than amethyst.

History

Ametrine has been mined in Bolivia since the 17th century. The Anahi Mine was given as dowry by Princess Anahi of the Bolivian Ayoreos tribe to a Spanish conquistador, Don Luis Philipe. Ametrine made its appearance in Europe when Don Luis Philipe returned to Spain and gifted the Spanish queen with ametrine.

Ametrine Sources

Bolivia currently yields the only major source of natural ametrine. The quartz is found in veins in dolomitic limestone. Small amounts of ametrine have been found in India and Brazil, however, the quality is inferior to Bolivia's.

Gemological Facts

Ametrine has a Mohs scale hardness of 7, making it fairly durable. It has a vitreous luster with crystals that are considered translucent or transparent. Its class is tectosilicate and it has a trigonal crystal system. Its refractive index is 1.54 - 1.55 and its relative density is 2.65.

Metaphysical and Healing Properties

Metaphysicists believe ametrine cleanses the body of negativity, induces sound sleep, fosters better relationships and increases self-confidence. It is thought to be a calming stone, frequently used in meditation. Ametrine is also believed to aid in metabolism and digestion, and it is used to treat arthritis, muscle pain, and nervous disorders.

Synthetic Ametrine

Since 1994, Russia has produced synthetic ametrine in labs. The price of synthetic ametrine is lower than genuine ametrine and buyers should differentiate between the two when purchasing.

Caring For Ametrine

Ametrine can be worn daily so long as care is taken not to hit or scratch it against other hard surfaces. Use warm soapy water and a soft jewelry brush to clean ametrine. Ultrasonic cleaners may be used, but steam cleaners should not be used. Avoid exposing ametrine to harsh chemicals, prolonged sunlight and extreme temperatures.

Resources

• Gemstone.org
• Crystalgems.com