Diamond were formed deep underground in conditions of intense heat and pressure.Artificial diamonds can be made n factories .Pure carbon is baked under gret pressure to over 1400C .NAtural diamonds were probably found under similar conditions.Diamonds are mined in South Africa ,Tanzania ,Siberia,Africa ,India,Indonesia, Brazil,Australia and the former Soviet republics..Gold is found in mineral veins in rocks , or in gravels which have been washed away from areas where gold -bearing rocks have been reoded.Prospectors may pan the gravel in streams for grains of gold.Half of the world's gold is mined in South Africa.
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