Lanscape of the Chapada Diamantina
|The name Diamant is derived from the Greek words, diaphainein (diaphanous) and adamantos
(invincible). No wonder: After all, the diamond is the hardest known
natural material found on our planet! The formation of the diamond has
occurred at different times throughout the evolution process of our
planet. The youngest diamonds are about hundred odd years old; the
oldest are estimated to be about three billion years old. They are
comprised of carbon and are formed in the earth’s core under
enormously high pressure at depths of 100 to 200 kilometers and
temperatures of over 1300° C.
The volcanic rock transports shards of the earth’s core containing diamonds on to the earth’s surface through volcanic eruption. Through the weathering process, owing to which the hardness of the diamonds remains intact, they are transported further and get deposited in valleys and rivers, which is where most diamonds are found today. But, because of the meteoritic impact, the carbon is so strongly compromised that small diamond crystals are formed.
Gruta Azul, Chapada Diamantina
ideal conditions the diamond is transparent. However, sometimes it may
happen that it gets tarnished due to different pollutants, or in
different lighting, the colour may get stained.
There are four criteria to evaluate a diamond, the so-called “4 Cs”: carat, colour, clarity and cut. The weight of a diamond is traditionally stated in Carats, wherein one Carat is equivalent to 0.2 grams. The diamond is categorized in different groups depending on its shade of white, where in the colour starts with “extremely fine white+” (River+) and ends in “tinted 4” (Yellow).
The purity of the diamond is evaluated through its “clarity”. The higher the impurities or inclusions in the diamond, the lower is the classification grade in terms of clarity. The last evaluation criterion is the “cut”, that is the form or cut of a diamond.
Poço Azul, Chapada Diamantina
lunch, back again to the river: more shoveling, rinsing, sieving! The
sun shines without mercy, but it is surprising how a person can get
used to it. To begin with, Cago installs the grate once again in the
dam. Many of the garimpeiros
work in pairs and share the proceeds. However, while Cago works alone,
he must also shovel the other side of the dam to ensure a good outflow
of water and to maintain a ‘passage’ through the grate.
Once this is done, he continues to shovel the gravel into the wheelbarrow, untiringly, the entire afternoon, ensuring that every haul is flushed out through the grate. At the same time, he proceeds cautiously with the grate, by no means is he rough or coarse. After filling the wheelbarrow, he removes the bigger stones from the grate to ensure that the water flows uninterrupted. No, he is not bored, and neither does he feel isolated. Every now and then a colleague comes along and they chit-chat while he continues to shovel.
oldest diamonds come from India and were found here as early as 4000
BC! Before the discovery of the Brazilian deposits in the year 1725,
India was the only country that supplied diamonds. In 1730, the Royal
Palace of Portugal declared the discovery site of the state of Minas Gerais in the Brazilian colony, as the property of the Crown. A new fiscal source of income was - of course - always welcome!
The city of Tejuco, located to the north of Belo Horizonte, and founded by the diamond prospectors was later renamed as what is today known as the Diamantina. Diamonds were discovered in Serra da Chapada in the state of Bahia in the year 1755, and therefore it was given the name, Chapada Diamantina. The existence of these sites can be attributed to the transfer of weathered deposits containing diamonds borne from volcanic rocks.
quality of the Brazilian diamonds can, in general, be described as
good. The only limitation being that they are, on an average, of a
Other than the Canadian firm “Brazilian Diamonds Ltd.”, even the Brazilian mining firm, “Mineração Rio Novo Ltda” is now mining underwater, partly with floating dredgers and divers, as well as with the help of pipes and water pumps. Essentially, however, the traditional, really archaic garimpeiro system is still maintained, even after the issuance of a law in 1989, granting concessions in the working conditions.
On Saturdays Cago walks the distance of 15 kilometers to Lençois to shop and visit his family and friends. He would rather buy a mountain bike, but his frugal earnings are not enough to save for it. “The money is just enough for the bare necessities.” He is separated from his wife, and their two sons live with her.
|When he is in town, he visits them regularly. He says with a friendly smile, “I always look forward to seeing them.” He visits his friends only when he has a little money to spare, not so that he can be simply invited for a beer. “I cannot turn up every time without money and allow them to endure with me. That would just not be right,” he looks at me questioningly.
Cago’s parents are retired and live in Igatù, an old diamond-mining town, situated at a distance of about 130 kilometers from Lençois. Once in a while, time and money permitting, he travels by bus to visit them. Despite the limitation of materials and hard physical labour, Cago appears satisfied and balanced. He stands firm in his life and has clear ideas. He portrays to all, an iron will, but in reality he is cheerful and level headed.
the end of the working day, around 17:00 hours, he starts sieving, that
is once more, he sieves the gravel out of the grate. He is excited,
placing the sieves, one on top of the other, swiveling the stones and
the sand rhythmically in circles. The sand drains through the sieve and
the heavier stones continue to rotate within. That means a diamond, if
there is one, should be lying in the middle of the sieve.
|After the long, hot and tough day, I cannot quite believe, that he would find something. Still, I ask him curious, “And?” He looks for a while with total concentration at the remaining stones in the last sieve and then says, much too calmly, “Tem”. He had found one! I jump up, this I have to see! Oops, where is it? I can’t see any diamond. Here? No there? Definitely not so easy, there are natural crystals in there, which can deceive a novice, they are absolutely worthless. Then he said, again too calmly, “Tem dois!” Wow! Two! Here is the first….|
|Well, they are quite small. Nevertheless, I am happy for him. But Cago remains calm, even though it is an important find for him. What would he get for the diamonds from his dealer? Cago examines the diamonds once again in silence and says, “The bigger one is not particularly beautiful; it is broken and tarnished. The smaller one is clear and very elegant, but still very small. About 30 Reais for each, approximately”. That is not too much and I am a little disappointed - I would have granted him more. I thought, rough diamonds should have been more expensive. But anyhow, this day had been profitable for him. He had once again made the best out of the situation and earned himself some days of freedom from the river. Parabéns, caro Cago! (Congratulations, dear Cago!)|