Gold Sellers Gold Dealers Mineral Miners in Madagascar

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The huge island of Madagascar off the coast of Mozambique had never been an important source for gemstones. Then in 1998 large deposits of high quality corundum were discovered. The result was a kind of gold rush on the island, as thousands of miners flocked to the mines. Madagascar is most famous for ruby and blue sapphire, but many different colors of corundum have been found there, including pink, yellow, green, white and padparadscha.

However, it is not just the quantity and variety of material that has made Madagascar so important as a sapphire producer. Rather it is the combination of the quality and size of the gems, a combination that had not been seen in the gems business for many years. Madagascar has also yielded some new gem varieties, such as the discovery of pezzottaite in 2002. The first blue garnets known were found in Bekily in 1998.

Once a significant gold producer, Madagascar is once again focusing on its mining sector. The country is considered one of the best gold exploration targets in Africa.

Madagascar’s primary gold deposits are thought to be of mesothermal “lode” quartz-hosted type. This type of lode gold deposit is extremely valuable, accounting for nearly 20 percent of world gold deposits. The same type of deposits can also be found in Australia, Canada, Brazil and Ghana. Madagascar gold is found specifically in greenstone belts, quartz reefs and quartz veins, and as diffused mineral. Gold has also been recovered from ancient and recent alluvial accumulations and lateritic earth. The mineralization of vein deposits is mainly gold-quartz and gold-sulphide associations.

Primary gold deposits in Madagascar predate the breaking up of Gondwana, the southernmost of the two super continents that made up Pangea. This is an important fact, as is renders regional tectonics irrelevant to the gold deposition model. Madagascar’s basement rocks- the oldest rocks in the area, have been divided into three main systems. From the youngest to the oldest these are: the Vohibory System the Graphite System, and the Androyen System. The Graphite system forms the greatest part of Madagascar’s basement and is the most consistently mineralized in gold. The Vohibory System also contains some gold districts.

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