Brazil
Brazil
South America's gemstone superpower, source of emerald, aquamarine, tourmaline, topaz and most of the world's coloured-stone variety
Brazil is the most important single source country for the diversity of coloured gemstones in the world. No other country produces gem-quality material across as many species at commercial scale. Brazilian production has dominated the international coloured-stone trade since the eighteenth century, when the country first became a major source of diamond, and the country's geological and geographic diversity continues to support significant output across emerald, aquamarine, morganite, tourmaline, topaz, amethyst, citrine, andalusite, alexandrite, and a long list of other species. The cutting industry centred in Teófilo Otoni and Governador Valadares, Minas Gerais, processes both Brazilian and imported rough at significant scale.
Geological setting
Brazil's gem wealth derives principally from the granitic pegmatites of Minas Gerais and adjacent states, with significant additional production from metamorphic and alluvial settings. The Eastern Brazilian Pegmatite Province extends across approximately 150,000 square kilometres of Minas Gerais, Espírito Santo, and Bahia, with hundreds of individual pegmatite bodies producing gem-quality beryl, tourmaline, topaz, and quartz varieties. Diamond-bearing alluvial deposits in Bahia, Goiás, Mato Grosso, and Minas Gerais once dominated the world supply; modern production is much reduced but still significant in places.
Diamond
Brazil was the world's principal source of diamond from approximately 1725 to the 1860s, when South African discoveries displaced it. The principal historical Brazilian diamond field was in Minas Gerais near Diamantina, with secondary production in Bahia and Goiás. Modern Brazilian diamond production is small, with garimpeiro alluvial operations in Mato Grosso and other states yielding fancy coloured stones — particularly fancy yellows and greens — that occasionally enter the international market.
Beryl varieties
Brazil produces fine emerald from the Belmont, Capoeirana, and Carnaíba mines, fine aquamarine from numerous Minas Gerais and Espírito Santo localities, fine morganite from the same general regions, and heliodor from various sources. Aquamarine production includes some of the world's largest gem-quality crystals, with metre-scale specimens from the Pedra Azul region. The Brazilian aquamarine trade is a major contributor to the international supply at all quality tiers.
Tourmaline
Brazil is the world's leading source of fine tourmaline, including the Paraíba tourmaline first discovered in 1989 in the state of Paraíba. Paraíba tourmaline, coloured by trace copper, displays the most saturated and electric blue-to-green hues seen in the species and commands the highest prices per carat in the tourmaline category. Beyond Paraíba, Brazil produces conventional Elbaite tourmaline in pinks, greens, blues, and the watermelon polychrome variety, principally from Minas Gerais.
Topaz
Brazilian imperial topaz from Ouro Preto, Minas Gerais, is the world's principal source of fine pinkish-red and orange topaz. Brazilian colourless and blue topaz dominate the world commercial supply for those colour ranges, with treatment — irradiation followed by heating — used to produce the standard sky-blue, Swiss-blue, and London-blue commercial varieties.
Quartz varieties
Brazil produces vast quantities of amethyst, citrine, and rose quartz, with the amethyst geodes of Rio Grande do Sul a major commercial source for the world market. The southern Brazilian states are essentially the principal source for amethyst at commodity scale.
Other species
Andalusite from Brazil is among the finest available. Alexandrite from Hematita and other Minas Gerais localities is significant in the fine-stone market. Spodumene including kunzite, garnet, chrysoberyl, and a long list of further species are produced at varying scales.
The cutting industry
Teófilo Otoni in Minas Gerais is one of the world's principal coloured-stone cutting centres, with several thousand cutters and dealers operating in and around the town. Governador Valadares is a secondary centre. The Brazilian cutting industry processes both domestic and imported rough, with particular strengths in tourmaline, beryl, and the harder species. The trade is organised through periodic gem shows and through a network of family-run firms with deep history in the country's gem industry.
In the trade
For dealers, Brazil is the indispensable origin to know. The country's combination of varied production, established cutting industry, and accessible export channels makes it the natural starting point for any inventory in coloured stones. Buyers should be aware that Brazilian attribution covers an enormous range of qualities and that the value of a Brazilian designation depends entirely on the specific source within the country and the documentation of provenance.