1776, Diamantina (Minas Geraes)

Diamantina is one of my favourite cities; I lost track of the number of times I visited this Luso–Brazilian jewel. The city, the region, its diamonds and geology are a common topic in this blog, either as posts (here, here and here) or photo galleries (here, here and here – just click on the links). Located north of Belo Horizonte, this town classified as … Continue reading 1776, Diamantina (Minas Geraes)

The source of diamonds in the Diamantina (Minas Gerais) region: Fm. Sopa – Brumadinho

The precambrian Sopa Conglomerate is the source for modern alluvial diamonds deposits in the Diamantina (Minas Gerais) region. This old secondary formation is being reworked by the rivers in the area, releasing the diamonds it stores (themselves originated in primary, still unidentified, sources) into modern alluvia. Both the old conglomerate (Fm. Sopa – Brumadinho – … Continue reading The source of diamonds in the Diamantina (Minas Gerais) region: Fm. Sopa – Brumadinho

A mineral treasure trove in Goiás (GO) and Minas Gerais (MG) – BRAZIL

I have been in Goiás (GO) and Minas Gerais (MG) – Brazil in the last two weeks. It is a land of mineral opportunities – in a couple of days I visited manganese, iron, emerald, gold, nickel, diamond, aggregates and limestone deposits and prospects. It was the ideal road trip: looking for mineral deposits, in … Continue reading A mineral treasure trove in Goiás (GO) and Minas Gerais (MG) – BRAZIL

Zimbabwean diamonds in Brazil

Zimbabwean diamonds were in the news recently, with reports of their alluvial deposits – the base of their boom production in the last years – being close to exhaustion. These ones were photographed in Diamantina, Minas Gerais (Brazil), far from home. They are not the prettiest thing, certainly not like the famed Angolan alluvial diamonds … Continue reading Zimbabwean diamonds in Brazil

Diamonds from Diamantina – MG, Brazil

Diamonds occur in many colours, shapes, sizes and transparencies. Sometimes they just look like sand (well, expensive, very expensive sand, as a lowly 10 USD/carat stone is worth more than gold – currently hovering 1.200 USD/oz); or else diamonds may be broken (chips), dotted in the inside with other minerals, eroded or pitted at the … Continue reading Diamonds from Diamantina – MG, Brazil