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A 647-Carat Diamond Was Found in Coromandel, Minas Gerais. Valued at R$ 16 Million, It Is the Second Largest Diamond Ever Registered in Brazil. Understand the Historical Discovery.
The mining town of Coromandel, located in Alto Paranaíba, has once again captured national attention after the discovery of an impressive 647-carat diamond, valued at around R$ 16 million. Considered the second largest gemstone ever registered in Brazil, the gem was extracted from the rural area of the municipality, in a region known as Douradinho. The find reinforces Coromandel’s historical reputation as one of the country’s main diamond hubs.
With just over 28,000 inhabitants, according to IBGE, the mining municipality reaffirms its natural vocation for high-value mining. Below, you will understand all the details about the find, its economic, historical, and geological importance, as well as the impacts for the region.
The 647-Carat Diamond: A Rare and Valuable Discovery
The diamond found in MG has approximately 647 carats, which corresponds to over 129 grams. It is a rare gem, with brown coloration visible right after extraction. The confirmation of the stone’s nature was carried out by a mining engineer from the region, who specializes in geological analysis, although her identity has not been revealed.
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The discovery occurred about ten days ago and was kept under wraps until official confirmation. The mayor of Coromandel, Fernando Breno (PRD), was the one who publicly confirmed the achievement, highlighting the city’s historical role in diamond mining. The technical analysis concluded that it was a legitimate gem, and the news quickly spread throughout the city and national media.
Estimated Value: R$ 16 Million — But It Could Be More
According to local sources, the 647-carat diamond has already been sold for R$ 16 million. However, as experts point out, the market value of a gem of this magnitude can vary enormously.
According to geologist and gemologist Daniel Fernandes, who went viral on social media commenting on the stone, the precise evaluation depends on several factors: color, clarity, cut, and origin. “The same gem can receive different evaluations depending on who is analyzing it. If it were a white or pink stone, for example, the value could be even higher,” explained Fernandes, who graduated from the Federal University of Mato Grosso (UFMT).
The brown coloration visible in the image released immediately after extraction may not reflect the true shade of the diamond. Fernandes highlighted that the gem may be covered by sediments, which can alter the initial visual perception. “It could be clearer or even whitish after cleaning,” he stated.
This preliminary analysis still generates expectations about the potential final valuation of the stone after treatment and possible cutting.
The City of Coromandel: Land of the Largest Diamonds in Brazil
The discovery of the second largest diamond in Brazil is not an isolated fact in Coromandel. The city has previously recorded two other historic finds:
- Getúlio Vargas Diamond (1938): with 728 carats, it is considered the largest diamond ever found in Brazil. It was extracted from the Santo Antônio River, also in the rural area of the city.
- Another diamond over 600 carats was also located in the same region, ranking third in the national ranking.
With these three discoveries, Coromandel consolidates its position as the municipality with the largest diamonds ever recorded in the country, being nicknamed by many as the “Brazilian capital of precious stones.”
The Douradinho River and the Mining Tradition in the Region
The discovery specifically occurred in the bed of the Douradinho River, a traditional mining area in the rural zone of Coromandel. The city hosts several mining companies, cooperatives, and artisanal mines, which drive the local economy and employ hundreds of workers.
According to Mayor Fernando Breno, mining activity is deeply rooted in the cultural and economic identity of the municipality. “Our land is very rich. It has been a long time since a diamond of this size was discovered,” said the manager.
Local Impact and Pride: “A Gift from God”
The news of the discovery generated great excitement in the city. Local authorities and residents described the event as something “historic” and “unforgettable.” “It was something very different that truly caught everyone’s attention. It is a gift from God for our nature,” stated a source connected to the municipal Executive.
The atmosphere of celebration and pride swept through the region. The city, which already has a monument in honor of the Getúlio Vargas diamond, may now see its history renewed with a new mineral relic.
Geological Origin of Diamonds in Minas Gerais
Minas Gerais is one of the states with the greatest geological potential for diamonds in Brazil. The origin of these precious stones is associated with deep rock formations, called kimberlites — volcanic tubes that bring the mineral to the surface after millions of years of geological activity.
In the Coromandel region, these formations are abundant, which justifies the frequency with which diamonds are found, both by companies and by artisanal miners. The municipality is part of the diamond province of Alto Paranaíba, recognized by the Geological Service of Brazil (CPRM) as one of the most promising areas for gem mining in the country.
Legal Aspects and Regulation of Mining
In Brazil, diamond mining — whether by companies or cooperatives — is subject to regulation by the National Mining Agency (ANM). To legally explore these areas, a valid mining title and an approved mining plan are required.
The ANM has not officially confirmed the company responsible for the extraction of the 647-carat diamond, but according to the Municipality of Coromandel, the area was being explored by a regulated undertaking. After the analysis by the mining engineer, the authenticity of the gem was attested according to the required technical criteria.
Economic Impact for the City and for the Country
Although the sale value of the 647-carat diamond may represent a temporary financial boost, its impact goes beyond the transaction. The discovery generates:
- Increase in the Valuation of Local Mining Areas
- Attraction of New Investments in Mining
- Strengthening of Thematic and Historical Tourism
- Incentive for Professional Training in the Field
Moreover, the visibility of the discovery increases international media interest and foreign buyers for Brazilian diamonds.
Cultural and Artistic Tradition: When the Stone Becomes a Song
The find in Coromandel not only has economic value but also symbolic and cultural significance. The mayor mentioned a song by composer Goiá, which honors miners and highlights the city’s role as the birthplace of the largest precious stones in the country:
“Coromandel, the most radiant fragment, the most beautiful diamond from Brazil’s mines.”
These elements reinforce the pride of the people of Minas Gerais and strengthen local identity around mining.
How Is a Diamond Evaluated?
Evaluating a diamond is a complex task and requires specific technical criteria. Among the main parameters considered are:
- Weight in Carats: the larger, the more valuable.
- Color: white, blue, and pink diamonds are rarer and more expensive.
- Clarity (Purity): fewer internal inclusions (imperfections).
- Cut: influences the brilliance and final market value.
- Origin: natural gems are more valuable than synthetic ones.
The diamond from Coromandel will still undergo cleaning processes and eventual cutting. After this process, the market value may be significantly reviewed.
Diamonds in Brazil: Where Else Are They Found?
In addition to Minas Gerais, other Brazilian states with significant diamond production are:
- Mato Grosso
- Pará
- Bahia
- Rondônia
However, most of the large diamonds ever registered in the country originate from Minas Gerais, specifically from the Alto Paranaíba region.
The discovery of the 647-carat diamond in Minas Gerais reinforces Brazil’s prominence in the global precious stones market. Valued at R$ 16 million, the find not only represents the second largest precious stone ever registered in the country but also renews the historical, economic, and cultural importance of the city of Coromandel as a true treasure trove of natural wealth.
While experts continue to analyze the true value of the gem, the impact of the discovery is already being felt in the city and resonates throughout Brazil as a symbol of the national territory’s mineral abundance. Nature has once again proven that it keeps its greatest treasures deep within the mining soil.
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