Mineral Resources of Minas Geraes (Brazil) (Classic Reprint)


Book Description

Excerpt from Mineral Resources of Minas Geraes (Brazil) Every writer who has made a study of the mineral resources of Brazil has been struck by the amazing anomaly that proportionately as the incalculable extent and richness of those resources has become better known, the mining industry of the country has diminished. Many reasons have been advanced to explain the enigma that the facts present. The liberation of the slave-workers, bad legislation and exorbitant taxation, lack of railway communication, political unrest and financial instability, and the incompetence and dishonesty that have attended the exploitation of the mines and the management of the companies that have been formed to work them, are among the numerous disabilities from which the industry has suffered in the past; but while these drawbacks are being steadily removed, the disfavour, into which mining enterprise in the Republic has fallen, remains. The Brazilians themselves, apparently indifferent to the enormous national asset which these minerals represent, have devoted their activities to agricultural advancement, and it would almost seem that these people, with a score of potential gold-fields at their very doors, are immune from that "gold fever" which has rendered possible the recent stupendous progress that has been made by a host of other countries less rich in minerals than their own. The diamond industry of Brazil is a dwindling enterprise in the hands of individual prospectors and ill-equipped bands of miners, although for a century and a half which succeeded the discovery of the first brilliant in Diamantina, Brazil's output of diamonds exceeded that of any other country. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.










Mineral Resources of Minas Geraes (Brazil)


Book Description

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Mineral Resources of Minas Geraes (Brazil)


Book Description

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Mineral Resources of Minas Geraes


Book Description

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 edition. Excerpt: ... came into the capital of the State with over 300 fine stones found in the Rio Graca, a tributary of the Araguaya. In Matto Grosso, the principal seat of the diamond mining is the River Coxipo Mirim. The depth of the cascalho varies, but the maximum is about 14 ft., and is comprised of jaspers, amethysts and chalcedonies, rose zircons, anatase, almandine garnets, white topazes, sphenes, native silver, &c. The diamonds are small, the largest found being 5 carats. The form is usually dodecahedron with well curved faces. The surrounding formation is schists and quartzites. No carbonates or boart is found. FAMOUS BRAZILIAN DIAMONDS. Two diamonds produced by Brazil have become historic under the names of the Estrella do Sul and the Diamond of Dresden, both of which are now owned by an Indian prince. Both were found in the alluvial workings of the River Bagagem. The Estrella do Sul, discovered in 1853, weighed in the rough 255 carats and 125 carats cut, and the Dresden Diamond weighed carats uncut and 63J carats cut. In 1910 a third gem was discovered, weighing 175 carats, which has been named the Estrella de Minas. Dr. Derby, writing in the American Journal of Science (September, 1910), advances the theory that these three diamonds were of the same original form, i.e., that of a combination of curved faces, constituting a dome rising from a plane surface. The River Abaete produced a stone of 161J carats in 1797, and another, later, of 48 carats. In 1906 a stone of some 600 carats was encountered in the River Verissimo, in Southern Goyaz, not very far from Bagagem, but was destroyed by being tested on an anvil with a sledgehammer. A splendid brilliant, dating from colonial times, near to ruby red in colour, and weighing 2f carats. sold in...