¶ … formed to what their value is as well as the characteristics of diamonds.
Diamonds
Diamonds are forever! They are the most beautiful, extraordinarily brilliant, hardest, and highly desired out of all the gems. The word "diamond" holds many different meanings for many different people. The meaning of the gem depends on the occasion or interest one holds in the gem. On wedding and engagement ceremonies, diamonds are given to the couple because for one's fiancee or wife, a diamond is symbolizes purity and commitment to never-ending love. We often hear the brand mantra of De Beers "A Diamond is Forever." For the Sports Fan, a diamond is the focus of American baseball; to the gambler or bridge addict, it signifies a suit of playing cards; to the rich and famous, the commodity represents wealth and status; to the monarchist, its beauty, rarity and durability symbolize royalty. However, the question we should ask ourselves is 'what is diamond'? Where is it found? How does is it found in the environment in its raw form? How is it formed? The following text answers these questions to satisfy the individual reader, especially if the reader's knowledge is limited to the engagement ring and other ways of suing diamonds in jewelry. [McCarthy, J.R.: Fire in the Earth - The Story of the Diamond]
Basically people have knowledge of gem quality diamonds that is restricted to what we know as the four "Cs"-Clarity, Carat (weight), and Color and "Cut," which also establish its value in the market place. Diamond is the world's hardest substance, which is quite surprising because unlike the extremely soft mineral graphite, it is just made up of only one element, which is carbon. Although, diamond and graphite have the same compositions but the two minerals differ widely in their physical properties. This is due to the difference in how the atoms are arranged in both minerals. The most pronounced contrast is exhibited in color, transparency while the other features simply reflect a difference in the structure of the crystal, that is, how the carbon atoms are arranged and packed in the crystal lattice.
The difference in the crystal structures of graphite and diamond are shown in figure 2. In figure 2(a), we can see a 'ball -- and stick' illustration of the graphite structure. The structure shows the carbon atoms to be arranged in sheets of six-member rings. The diagram illustrates how the sheets are loosely held together. The fact that the layers are loosely held together is what characterizes graphite to be soft and surprisingly slippery. The structuring of the layers is what allows them to slide over one-another. This property of graphite makes it an excellent lubricant; it is also being used as an alternative for grease and other lubricating products. Figure 2(b) shows the diamond structure. The carbon atoms are rigidly bound to each other through the sharing of electrons in a cubic pattern. This arrangement characterizes for the mineral's unusual and unexpected hardness as well as other distinguishing properties. [Kraus, E.H., Hunt, W.F., Ramsdell, L.S., Mineralogy - An Introduction to the Study of Minerals and Crystals.]
Diamonds were discovered in India over 2000 years ago, where the diamonds became a source of commercial trade until they were discovered in Brazil in 1730. In the countries it was discovered in, diamonds were found in the alluvial deposits of sand and gravel. The deposits are called "secondary deposits," since they were formed from the erosion of bedrock or "primary" sources. As far back as the 1960's, more than 80 per cent of world production of diamonds came from alluvial or secondary sources. Other sources of primary deposits consequently were discovered in South Africa in the 1870s; in Russia in the 1950s; in Botswana in 1966; followed by Australia in 1979, which has the world's largest diamond producer in the Argyle mine. Discovery of diamonds is rather new in Canada, where they were discovered in 1991. After so many years of discovery, diamonds are now being produced in more than 20 countries, with an annual production of about 110 million carats by weight. In an analysis conducted by the U.S. Bureau of Mines it was found that almost half of the diamonds...
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