Sitbon Mineracao is a alluvial diamond mining exploration Company with operations in the State of Minas Gerais in Brazil.  

Alluvial diamond mining is an above ground form of mining which concentrates on gathering diamonds on the surface.

This is the most traditional and oldest mining method in the diamond industry, which originated hundreds of years ago in India.
This method is widespread even today, mainly in Brazil,  Africa and now in Israel.

Brazil was the first western country to produce diamonds from the washing of alluvial deposits found in central Minas Gerais in the early 1700s.
For a century the country remained the world's greatest producer, losing its position only after the discovery of the Kimberley field in South Africa.
Currently there are placer deposits (garimpos) scattered throughout the majority of the states.
Large diamonds of several hundred carats have been found periodically in the area of the municipalities of Abaeté and Coromandel in western Minas Gerais State.
Sitbon Mineracao is located on the Abaeté River, an area in Minas Gerais famous for producing  diamonds.

Several of the largest diamonds found in Brazil originated here...

Sitbon Mineracao  is developing a large scale dredge based alluvial mining operation and the Abaete River drainage in The Fazenda Buriti (Farm Buriti), situated in Tiros.
Tiros was first settled during the Portuguese colonial period in the eighteenth century due to the discovery of diamonds. 

The first settlement was called Vila de Santo Antônio de Tiros.

In 1867 it became a parish of the municipality of São Francisco das Chagas do Campo Grande; in 1870 it jointed the municipality of Dores da Marmelada; in 1911, it became a district; in 1923 it became the municipality of Tiros.

According historians, the name is derived from a firefight between diamond miners and smugglers in 1801.