For the first time joined the "king of gems" about 6,000 years ago in India in appearance. There he was revered as a magic stone and supported by the dominant castes as a talisman. In ancient Rome was considered diamonds for tears of the gods, in the Middle Ages described one his fire as a "divine splendor on earth." Always the diamond was the symbol of perfection, purity and sanctity.
Evidence of this is its name, which comes from the Greek word "adamas" and "the invincible" means. Today the diamond adorns so many engagement ring as a symbol of eternal love and undying loyalty. The attribute of immortality is no coincidence, many diamonds but have since their formation survived billions of years. The previously oldest diamond was found in Australia in 2007 and has more than 4 billion years almost as old as the earth itself.
Although he does not gem quality, but gives valuable information for the study of Earth's history. Diamonds are minerals of pure carbon, the 150-300 km deep in the mantle under high pressure and at very high temperatures crystallized. Through volcanic eruptions they are transported with the magma to the surface and lie there in volcanic Eruptivschloten, called Pipes. They are often further eroded as a result of natural weathering and accumulate in sedimentary rocks. The largest diamond deposits are located in Australia, more deposits are in Brazil, Venezuela, Canada, Russia, China and Afrika. About 75 percent of mined diamonds are preferred for their high wear resistance and hardness - they reach the only gemstones Mohs hardness 10 - for industrial purposes used and are of high quality Cutting, drilling and grinding tools have become indispensable.
Only about a quarter of the diamonds has gem quality and is suitable for jewelry processing or as an investment. Certified Investment diamonds, diamonds purchased from authorized dealers are considered stable, inflation-proof investment. About quality and price of diamonds decide the "four C": Carat (weight), color (color), Clarity (purity) and cut (cut). The highest value have large, colorless, flawless stones with perfect been executed grinding, and so should the De Beers Millennium Star, which is considered as the largest flawless diamond with 203 ct and was first presented at the millennium in London, among the most expensive diamonds in the world. Unlike other gemstones, the color of the diamond does not affect.
Although Colorless stones possess the greatest value, however, popular collectibles are also colored diamonds, called "fancy diamonds". They are all unique, the color spectrum (128.51 ct) on brown, green, blue and pink ranging from canary yellow of the famous Tiffany up to the rare Red. Allen Diamonds are together the brilliance and the fire, which will be displayed when an artfully executed touches awakened countless internal light reflections to life. Most ground form is of 1456 invented by Louis van Berquen brilliant cut with at least 32 facets and a panel in the upper part, a circular girdle and at least 24 facets in the lower part. Only such polished diamonds may be referred to as diamonds. Whether classic colorless or "fancy" colorful, the diamond is one of the most sought after and most expensive gemstones in the world - after all, already knew Marilyn Monroe: "Diamonds Are a Girl's Best Friend".