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"Diamonds", sang Marilyn Monroe in the film Gentlemen Prefer Blondes, "are a girl"s best friend." You might not agree, but you can be sure that diamonds are not only 1 in the world, they are also the most expensive. A single diamond sold for $16.5 million at an auction in Geneva 2 !


Diamonds are found in a number of countries 3 Australia, South Africa, Brazil and The Russian Federation. In fact, there are two main types of diamonds. These are colourless diamonds (about 25% of those found), which have only a few impurities and are usually made into jewellery, and black diamonds—the 4 —which contain a lot of impurities, and are used in industrial applications. 5 are also produced artificially.
The largest diamond ever found is the Cullinan diamond. It 6 620 grams and was found in a South African diamond mine in 1905. It was bought by the Transvaal Government for ￡150,000, and then 7 to the King of England, Edward Ⅶ. The diamond was then cut into nine smaller jewels, which are now part of the British crown jewels. These jewels 8 to the British government and are kept in the Tower of London.
Most people think of diamonds in connection with jewellery and other types of 9 . Between 1885 and 1917, the Russian jeweller Peter Carl Fabergé made a number of decorated Easter eggs for the tsars of Russia and their families. The most 10 Fabergé egg to date was sold in 2007 by Christie"s Auction House in Geneva, Switzerland, for $18.5 million.