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The important property of diamonds chicago is toughness. This material has the ability to defend against breakage from powerful collision. Some diamonds are also used as electronic conductivity one such category is blue diamond. The surface of the diamond can be wet by oil but not by water. With this property oil can be used to take out diamond when creating synthetic diamonds. The jewelry stores in chicago are stable which in turn do not react with any reactants in room temperature. The pure diamond can be identified by the colour. But there is no single word to describe the colour of diamond. The pure diamond can be identified by passing visible light and tested whether it transmits through it. The colours are generated due to the uncleanness and defects in lattices. In a recent survey it was found that nearly 26,00kg diamonds are mined in a year which costs 9 billion. The survey also dictates that half of the diamonds come from the Southern Africa and Central. The other contributors in the world are India, Australia, Brazil and Canada. Most of them are extracted from kimberlite down the earth under high temperature. In the diamond ore only a few contains the actual diamond and the remaining are the impurities. The diamonds of larger size should be handled with care when ore is crushed. Only based on the density the diamond is sorted out. In 1870 the extraction of diamond started and till now 900,000 kg of diamonds is extracted. In some of the African countries there are groups who mine the diamonds and do business illegally. In some countries there are separate body to validate the diamonds. The diamonds can be divided into different categories like gem and industrial grade diamonds. There are also separate industries based on this category. The diamonds chicago designs even tricky engagement rings based on user needs.