Whether projecting from pegmatite walls or encrusting cavities in volcanic rock, quartz abounds worldwide. People have used quartz in jewellery for thousands of years. When quartz displays the colours of amethyst and citrine in a single gem, the material is called ametrine or amethyst-citrine. Ametrine’s only commercial source is the Anahi mine in Bolivia.
No place else
There is only one commercial source for ametrine: the Anahi mine in Bolivia.
The presence of amethyst and citrine colours in a quartz crystal is a rare gift of nature.
Ametrine’s colours blend, combine and contrast uniquely in each gem.
There are a number of processes used to alter the colour or apparent clarity, or to improve the durability of gems.Learn More
Some gemstones have synthetic counterparts that have essentially the same chemical, physical and optical properties, but are grown by man in a laboratory.Learn More
Any gem can be imitated – sometimes by man-made materials or by natural materials chosen by man to impersonate a particular gem.Learn More
Why We Love This Gemstone
No two ametrines look the same because the colours in each gem combine in a unique way.
There’s only one commercial source of ametrine, so the supply is very limited.
A Cutter’s Inspiration
Cutters delight in finding ways to maximise the beauty of ametrine.
The following factors combine to determine ametrine’s value.
Fine ametrines show beautiful contrast between their orange and purple shades.
Faceted ametrine generally has no eye-visible inclusions.
Unusual cutting styles add drama to ametrine’s unique colour combination.
A wide range of sizes is available. Large material is popular with gem carvers.
Ametrine Quality Factors: The Comprehensive Guide
Explore sources, gemmological research and the role of gems in history.
From the Andes to the Pantanál: in search of ametrineRobert Weldon, GIA , Apr 30, 2013 Read Article
The Anahí Ametrine mine, BoliviaPaulo M. Vasconcelos, Hans-Rudolf Wenk and George R. Rossman , Mar 1, 1994 Read more in English
Russian Synthetic AmetrineVladimir S. Balitsky, Taijin Lu, George R. Rossman, Irina B. Makhina, Anatolii A. Mar’in, James E. Shigley and Shane Elen, and Boris A. Dorogovin , Jun 1, 1999 Read more in English