De Beers is the world's largest diamond mining company and the world's largest and oldest diamond mining company, founded in 1888. Today it is the authority on diamonds in the world and it has become synonymous with diamonds. In addition to mining and producing rough diamonds, it is responsible for classifying, grading, valuing and selling most of the world's diamonds. Its business covers all areas of the "diamond supply line", from prospecting, mining, cutting, polishing, design and finally to the entire process of reaching consumers. It also performs diamond valuations and sells most of the world's uncut diamonds to diamond cutting centers, which cut and process the diamonds for use in jewelry.