Also known as Bolivianite, ametrine is a combination of bicolor amethyst and citrine in the same stone. It is only produced in the Anahí mine in Bolivia. The mine is located in a relatively inaccessible area of the rain forest zone of Santa Cruz, 30km west of the Pantanal, which establishes the border line between Bolivia and Brazil. Traditional mining methods are employed to extract the samples; no explosives are used in the extraction of the pieces, the crystals structures instead being removed by hand.

The first record of ametrine dates back to the seventeenth century when the conquistadors were ensconced in the area. One of their number received the mine as a dowry upon his marriage to an Ayorean princess, named Anahí. Unfortunately, in addition to the ill feeling roused by the marriage, the Ayorean people were further incensed by the news that Anahí was intended to return to Spain with her new husband. The perhaps inevitable result was that the princess was stabbed to death by her own people, in order that she remain in the sacred land. As she died, she exhorted her husband to take the crystal she always wore close to her chest. Upon her expiration, the conquistador opened his hand to find a beautiful stone, coloured purple and gold: ametrine. These two colours he took to represent his departed wife's conflicting loyalties and desires: her ties with her homeland and her people, and her love for her husband and excitement and curiosity at what might await her in her proposed new home across the ocean in Europe.

The mine was little heard of thereafter until the 1960's, when ametrine began to appear on the international market. There followed several years of plundering and unclear activities before the area was declared a fiscal reserve by the Bolivian government, and thereafter its sale to the present owners, Minerales y Metales del Oriente S.R.L., in 1989.