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Oppenheimer Blue
The Oppenheimer Blue is a vivid blue diamond that in May 2016 became the most expensive jewel ever sold at auction, until April 2017 when it was surpassed by the Pink Star diamond. The diamond was named for its previous owner Philip Oppenheimer. It is cut into a rectangle (emerald cut). The Oppenheimer Blue is the largest fancy vivid blue diamond classified by the Gemological Institute of America ever sold at auction; it sold at Christie's in Geneva in May 2016 for US$50.6 million (GBP 34.7m; 56.83m SFr). Two telephone bidders had competed for the diamond; the identity of the purchaser is not publicly known. See also *List of diamonds Diamonds become famous typically for some combination of their size, color and quality. Diamonds occur naturally in many different colors, so the largest diamond of a particular color may not be large in absolute terms, but it may still be consid ... References {{Reflist Oppenheimer family Blue diamonds Diamonds originating in South Afric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond
Diamond is a Allotropes of carbon, solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Another solid form of carbon known as graphite is the Chemical stability, chemically stable form of carbon at Standard conditions for temperature and pressure, room temperature and pressure, but diamond is metastable and converts to it at a negligible rate under those conditions. Diamond has the highest Scratch hardness, hardness and thermal conductivity of any natural material, properties that are used in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth. Because the arrangement of atoms in diamond is extremely rigid, few types of impurity can contaminate it (two exceptions are boron and nitrogen). Small numbers of lattice defect, defects or impurities (about one per million of lattice atoms) color diamond blue (bor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pink Star (diamond)
The Pink Star, formerly known as the Steinmetz Pink, is a diamond weighing 59.60 carat (11.92 g), rated in color as Fancy Vivid Pink by the Gemological Institute of America. The Pink Star was mined by De Beers in 1999 in South Africa, and weighed 132.5 carat in the rough. The Pink Star is the largest known diamond having been rated Vivid Pink. As a result of this exceptional rarity, the Beny Steinmetz Group called Steinmetz Diamonds took a cautious 20 months to cut the Pink. It was unveiled in Monaco on 29 May 2003 in a public ceremony. The Pink Star was displayed (as the Steinmetz Pink) as part of the Smithsonian's "The Splendor of Diamonds" exhibit, alongside the De Beers Millennium Star, the world’s second largest (the Cullinan I is the largest) top colour (D) internally and externally flawless pear-shaped diamond at 203.04 carat (40.608 g), the Heart of Eternity Diamond, a 27.64 carat (5.582 g) heart-cut blue diamond and the Moussaieff Red Diamond, the world's largest know ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philip Oppenheimer
Sir Philip Jack Oppenheimer (29 October 1911 – 8 October 1995) was a British diamond dealer and racehorse owner. Philip Oppenheimer was born on 29 October 1911, the son of Otto Oppenheimer. He was educated at Harrow School and Jesus College, Cambridge, where he was captain of the boxing team. In 1935, he married Pamela Fenn Stirling. They had one son, Anthony Oppenheimer Anthony Ernest Oppenheimer (born June 1937) is a British diamond dealer and racehorse owner. Early life He was born in June 1937, the son of Sir Philip Oppenheimer, and his wife Pamela Fenn Stirling. Career Oppenheimer was president of De Bee ..., and one daughter. References External links 1911 births 1995 deaths Alumni of Jesus College, Cambridge 20th-century British businesspeople British racehorse owners and breeders Businesspeople awarded knighthoods Knights Bachelor People educated at Harrow School Philip {{UK-business-bio-1910s-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond Cut
A diamond cut is a style or design guide used when shaping a diamond for polishing such as the brilliant cut. Cut does not refer to shape (pear, oval), but the symmetry, proportioning and polish of a diamond. The cut of a diamond greatly affects a diamond's brilliance; this means if it is cut poorly, it will be less luminous. In order to best use a diamond gemstone's material properties, a number of different diamond cuts have been developed. A diamond cut constitutes a more or less symmetrical arrangement of facets, which together modify the shape and appearance of a diamond crystal. Diamond cutters must consider several factors, such as the shape and size of the crystal, when choosing a cut. The practical history of diamond cuts can be traced back to the Middle Ages, while their theoretical basis was not developed until the turn of the 20th century. Design, creation and innovation continue to the present day: new technology—notably laser cutting and computer-aided design— ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond Color
A chemically pure and structurally perfect diamond is perfectly transparent with no hue, or ''color''. However, in reality almost no gem-sized natural diamonds are absolutely perfect. The color of a diamond may be affected by chemical impurities and/or structural defects in the crystal lattice. Depending on the hue and intensity of a diamond's coloration, a diamond's color can either detract from or enhance its value. For example, most white diamonds are discounted in price when more yellow hue is detectable, while intense pink diamonds or blue diamonds (such as the Hope Diamond) can be dramatically more valuable. Of all colored diamonds, red diamonds are the rarest. The Aurora Pyramid of Hope displays a spectacular array of naturally colored diamonds, including red diamonds. History of color grading Color grading of diamonds was performed as a step of sorting rough diamonds for sale by the London Diamond Syndicate. As the diamond trade developed, early diamond grades were in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemological Institute Of America
The Gemological Institute of America (GIA) is a nonprofit institute based in Carlsbad, California. It is dedicated to research and education in the field of gemology and the jewelry arts. Founded in 1931, GIA's mission is to protect buyers and sellers of gemstones by setting and maintaining the standards used to evaluate gemstone quality. The institute does so through research, gem identification and diamond grading services and a variety of educational programs. Through its library and subject experts, GIA acts as a resource of gem and jewelry information for the trade, the public and media outlets. In 1953 the GIA developed its International Diamond Grading System and the "four Cs" (cut, clarity, color, and carat weight) as a standard to compare and evaluate the quality of diamonds. Today, the institute is headquartered in Carlsbad, California and operates in 13 countries, with 11 campuses, 9 laboratories and 4 research centers. History The story of the GIA begins in the 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christie's
Christie's is a British auction house founded in 1766 by James Christie (auctioneer), James Christie. Its main premises are on King Street, St James's in London, at Rockefeller Center in New York City and at Alexandra House in Hong Kong. It is owned by Groupe Artémis, the holding company of François-Henri Pinault. Sales in 2015 totalled £4.8 billion (US$7.4 billion). In 2017, the ''Salvator Mundi (Leonardo), Salvator Mundi'' was sold for $400 million at Christie's in New York, at the time List of most expensive paintings, the highest price ever paid for a single painting at an auction. History Founding The official company literature states that founder James Christie (auctioneer), James Christie (1730–1803) conducted the first sale in London, England, on 5 December 1766, and the earliest auction catalogue the company retains is from December 1766. However, other sources note that James Christie rented auction rooms from 1762, and newspaper advertisements for Christi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swiss Franc
The Swiss franc is the currency and legal tender of Switzerland and Liechtenstein. It is also legal tender in the Italian exclave of Campione d'Italia which is surrounded by Swiss territory. The Swiss National Bank (SNB) issues banknotes and the federal mint Swissmint issues coins. In its polyglot environment, it is often simply referred as german: Franken, french: franc, it, franco and rm, franc. It is also designated through signes: ''Fr'' Some fonts render the currency sign character "₣" (unicodebr>U+20A3 as ligatured Fr, following the German language convention for the Swiss Franc. However, most fonts render the character as F with a strikethrough on the lower left, which is the unofficial sign of French Franc. (in German language), ''fr.'' (in French, Italian, Romansh languages), as well as in any other language, or internationally as ''CHF'' which stands for ''.'' This acronym also serves as eponymous ISO 4217 code of the currency, CHF being used by banks and financial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Diamonds
Diamond (gemstone), Diamonds become famous typically for some combination of their size, color and quality. Diamonds occur naturally in many different colors, so the largest diamond of a particular color may not be large in absolute terms, but it may still be considered very desirable. Diamonds may also have high valuations or sale prices, or go on to have a noteworthy ownership history, but this will tend to occur for diamonds that had some outstanding characteristic to begin with. As new diamonds are discovered, the uniqueness of existing ones may diminish and there is no agreed-upon measure of a large or a high-quality diamond, so a strict inclusion criteria for notable diamonds is not attainable. Diamond A diamond is a Allotropes of carbon, solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. At Standard conditions for temperature and pressure, room temperature and pressure, another solid form of carbon known as graphite is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oppenheimer Family
Oppenheimer is a surname. Notable people with the surname include: In arts and media * Alan Oppenheimer (born 1930), American film actor * Andrés Oppenheimer (born 1951), Argentine author and journalist known for his analysis of Latin American politics * Jerry Oppenheimer, American biographer * Jess Oppenheimer (1913–1988), American radio and television writer, producer, and director, creator of ''I Love Lucy'' * Joel Oppenheimer (1930–1988), American writer * Joshua Oppenheimer (born 1974), American film director * Lillian Oppenheimer (1898–1992), American origami pioneer * Max Oppenheimer (1885–1954), Austrian painter and graphic artist * Stephen Oppenheimer (born 1947), British paediatrician, geneticist, and writer on genetics and human prehistory In business Minerals * Bernard Oppenheimer (1866–1921), South African and British diamond merchant and philanthropist, brother of Ernest * Ernest Oppenheimer (1880–1957), diamond and gold mining entrepreneur and financ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blue Diamonds
Blue diamond is a type of diamond which exhibits all of the same inherent properties of the mineral except with the additional element of blue color in the stone. They are colored blue by trace amounts of boron that contaminate the crystalline lattice structure. Blue diamonds belong to a subcategory of diamonds called fancy color diamonds, the generic name for diamonds that exhibit intense color. Properties determining value The same four basic parameters that govern the grading of all gemstones are used to grade blue diamonds–the four Cs of Connoisseurship: ''color'', ''clarity,'' ''cut'' and ''carat weight''. Color is considered the absolute most important criterion in grading a blue diamond and determining its value. However, the most valuable of blue diamonds also exhibit the highest clarity grades. There is no known blue diamond with a completely flawless (F) clarity grading, although several are known which are graded Internally Flawless (IF). One of the earliest mention ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamonds Originating In South Africa
Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Another solid form of carbon known as graphite is the chemically stable form of carbon at room temperature and pressure, but diamond is metastable and converts to it at a negligible rate under those conditions. Diamond has the highest hardness and thermal conductivity of any natural material, properties that are used in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth. Because the arrangement of atoms in diamond is extremely rigid, few types of impurity can contaminate it (two exceptions are boron and nitrogen). Small numbers of defects or impurities (about one per million of lattice atoms) color diamond blue (boron), yellow (nitrogen), brown (defects), green (radiation exposure), purple, pink, orange, or red. Diamond also has a ver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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