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The best ametrines show distinct areas of orangey yellow and purple. These colours are featured in this graceful cut design. – Lydia Dyer, gem courtesy John Dyer & Co.

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Ametrine Quality Factors

Learn about the factors that make ametrine so desirable.

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Ametrine Description

Transparent, bicoloured quartz with the colours of both amethyst and citrine in the same gem is called ametrine or amethyst-citrine.

Concave facets on the pavilion contribute to the striking look of this 27.50 ct. ametrine. Creative gem cutters sometimes use concave facets to give a gem a dramatic appearance. – Robert Weldon, courtesy Minerales y Metales del Oriente

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Ametrine History and Lore

The world’s only commercial source of ametrine is the Anahi mine in southeastern Bolivia. Legend has it that a Spanish conquistador discovered the mine’s location in the 1600s and introduced the gem to Europeans when he presented several specimens to his queen.

Ametrine Optical Dishes: Windows into the Effects of Crystal Structure

Elise A. Skalwold and William A. Bassett, May 8, 2017

Optical activity is studied using a polished block of ametrine.

Karyna Sena stands in front of a sapphire mine near Colombo, Sri Lanka.

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Designer’s Love of Brazil – and its Gems – Shines in Every Piece She Creates

Jaime Kautsky, May 4, 2016

Karyna Sena, a third-generation gem and jewellery professional, infuses the rich tapestry of Brazil – and her joie de vivre – in each of her designs.

The Anahí Ametrine mine, Bolivia

Paulo M. Vasconcelos, Hans-Rudolf Wenk, March 1, 1994

The Anahí mine, Bolivia, has produced large amounts of amethyst, citrine and amethyst-citrine for the gem market.

With proper care, ametrine is a beautiful and versatile gemstone for all types of jewellery.

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Ametrine Care and Cleaning

Learn about ametrine's durability and how to care for your ametrine jewellery.

A Selection of Faceted Natural Ametrines.

Using Conventional Equipment to Separate Natural from Synthetic Ametrine

Guy Lalous, July 25, 2014

A summary of the article “A simple approach to separate natural from synthetic ametrine”, by Francine Payette.

Smoky Quartz Ametrine from the Yuruty Mine

Ametrine with Layers of Smoky Quartz

Dr. Michael S. Krzemnicki, June 1, 2000

An investigation of these Yuruty mine samples revealed an interesting new aspect to this bicoloured quartz.

Anahí’s “New” Ametrine

Robert Weldon, March 1, 2009

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewellery manufacturing techniques and industry trends.