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A black market for coltan â a strategically important mineral used in an array of electronic devices â has emerged in the Amazon jungles that cover the border area between Colombia, Venezuela and Brazil. In Venezuela and most of Colombia coltan mining is illegal, yet small-scale miners and buyers are plentiful.
Samuel Colt (July 19, 1814 â January 10, 1862) was an American inventor and industrialist from Hartford, Connecticut. He founded Colt's Patent Fire-Arms Manufacturing Company (today, Colt's Manufacturing Company), and made the mass production of the revolver commercially viable.olt died in 1862 as one of the wealthiest men in America. Colt's manufacturing methods were at the forefront of the Industrial Revolution. His use of interchangeable parts helped him become one of the first to exploit the assembly line.