It is common to attribute the first diamond finding to a cult called Dravidians in Indus culture from 2500 to 1700 BC. The first mention of diamonds in our sources is in the Bible - diamonds were embedded in the High Priest's breast. Scientists today doubt whether it was a diamond or any other precious stone. In Indian literature they found the first mention of diamonds in 321 BC. Diamond mining began on an industrial basis in India and Borneo Island. A French writer by the name of Tawnier reported that he was already in Goa, India, in the year. In 1615 diamond trade began to develop between England and London. About a century later, diamonds were also found in Brazil (1735). In 1860 they found diamonds in the south.
The weight of most of the gemstones is measured in a few carats, but there are some diamonds, unusual of their kind, that have been published around the world for their huge size and stunning beauty. The Colin Diamond was discovered in Transvaal in South Africa in January 1905 and given as a gift to the Queen of England Mary, by her husband, King George V. The diamond was later awarded to Edward VII, and cut into several large stones. Today the diamonds are emblazoned with the royal scepter, and are still called "Queen Mary's Diamonds". After its fission, several diamonds were shredded, including the "Great African Star" of pear-shaped form (74 surfaces), weighing 530.2 carats (the world's largest polished diamond). It is fixed in the British Royal Wand, as one of the "Crown Jewels". Another part of Collinnan, "The Little African Star" (317.4 carats) is fixed in the British Crown. It has a brilliant shape and is the fourth largest polished diamond in the world. In addition, McCollinan was graced two other huge diamonds, weighing 94.4 and 63.6 carats. The "De Beers Millennial Star" was found in the Democratic Republic of Congo in the early 1990s. Its major part, after polishing, is pear-shaped and weighs 203 carats. "De Beers Diamond" was first introduced in 1889. The gross stone weight was 428.5 carats, and the polished diamond weight - 228.5. Koh Kuwait diamond was found 5,000 years ago, apparently in Punjab, India; He is first mentioned in scripture in the 14th century. Its original weight was 793 carats, but an unforgivable fission reduced it in the 16th century to 186 carats; In the 19th century it was cut again, and now weighs 109 carats. This diamond is also found among British crown jewelery. The "Portuguese diamond" weighing 127 carats excels in its high transparency and rare cut, a rectangular emerald cut. Reserve at the Smithsonian Museum in Washington. The "Regent" diamond was discovered in India in the early 18th century. The weight of the raw stone was 410 carats, and from this one (among other things) this diamond, which weighs 140.5 carats. Napoleon set him perpendicular to his sword. Today it is on display in the Louvre. The "Blue Hope" diamond (blue, 45 carats) is the most notorious of famous diamonds: terrible disasters have befallen many of its owners over the years. Today it is reserved at the Smithsonian Museum.
Not all diamonds glow. Most are low quality and with black dots that do not allow light to be reflected back out. The degree of brilliance of the diamond is a function of the ability of light to go back out.
The diamonds can be divided in several ways: by zoning (where diamonds are divided into ornamental quality (20% of the world's diamonds), almost ornamental (near-gem - 45%) and industrial diamonds (35%)). Diamonds can also be sorted by size, color, shape and quality. The Central Diamond Manufacturers Association in London classifies diamonds by more than 1,500 types.
Today, the richest diamond country is Botswana, Africa, where $ 2.5 billion worth of rough diamonds is mined each year. After her, Russia ($ 1.6 billion). South Africa and Canada are competing for third and fourth places, each with $ 1.1 billion.
The first processed diamond, Golden Jubilee and weighing 545.67 carats. This stone was found in South Africa and is currently in Thailand. In the second largest stone, it is prettier and better known, called Cullinan I and weighing 530.20 carats, and can be seen in the Tower of London. According to a book that records all diamond polishing in history (from 80 carats or higher) by Famous Diamonds by Ian Balfour, where you can view the library of the RG Diamond Exchange.
There are a number of factors that affect the diamond price: 1. Diamond Weight. 2. Diamond color. 3. Clean the diamond. 4. The nature of processing. In any case, it is not possible to determine the nature of the diamond and refine its price once it is embedded in the jewelry, so it is not advisable to buy a diamond but to buy it separately and estimate its value and only then its stroke, as the difference can be expressed in tens of percent.
Treated diamonds are diamonds that have undergone various chemical treatments in order to artificially change their value. Some of these treatments, such as color change, are forever, and some, such as hiding defects, are very temporary. In any case, in the trading world it is customary not to sell treated diamonds unless they are declared to be. There is no written law in this regard, but among people who do business it is customary.
Diamonds have been made artificially for a long time. The means used to create are heat and pressure, to mimic the conditions of their formation in the soil. The possibilities to generate heat and pressure at the required levels are either by complex furnaces or by an explosion that results in the necessary results. In both cases the base material is used: carbon, which is the material from which the diamond is made. It should be noted that the level of diamonds produced in these processes does not reach an ornamental diamond level, but only an industrial diamond level. That is, artificially produced diamonds do not reach the level of transparency and cleanliness and size that characterize the diamonds from which ornamental diamonds are produced. Industrial diamonds are used for many uses in various industries. In industrial production, the size of the granules produced can be controlled, making it easier to adapt to industrial needs.