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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 Diamond (gemstone), Diamonds occur naturally and vary in size, color, and quality, so the largest of a particular color may not be large in absolute terms, but may still be considered very desirable. Diamonds may also have high valuations in sal ... References Oppenheimer family Blue diamonds Diamonds originating in South Africa 2016 ... [...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. Diamond is tasteless, odourless, strong, brittle solid, colourless in pure form, a poor conductor of electricity, and insoluble in water. Another solid form of carbon known as graphite is the Chemical stability, chemically stable form of carbon at Standard 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. 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) can color ... [...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 carats (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 carats 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 la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philip Oppenheimer
{{UK-business-bio-1910s-stub ...
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, 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 Philip, also Phillip, is a male name derived from the Macedonian Old Koine language, Greek (''Philippos'', lit. "horse-loving" or "fond of horses"), from a compound of (''philos'', "dear", "loved", "loving") and (''hippos'', "horse"). Prominen ... [...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 (diamond cut), brilliant cut. Cut refers to shape (Pear cut, pear, oval), and also the symmetry, proportioning and polish of a diamond. The cut of a diamond greatly affects a diamond's brilliance—a poorly-cut diamond is less luminous. In order to best use a diamond gemstone's material properties of diamond, 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 cutting, 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. The earliest diamond cutting techniques were simply to polish the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond Color
A chemically pure and structurally perfect diamond (gemstone), 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 colors of chemicals, chemical impurities and/or structural defects in the Crystal structure#Lattice systems, 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 colorless (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 Londo ... [...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, 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. As of 2024, the institute is headquartered in Carlsbad, California, and operates in 13 countries, with 11 campuses, 9 laboratories, and 4 research centers. History GIA was founded in the 1920s by ... [...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, and it has additional salerooms in New York, Paris, Hong Kong, Milan, Geneva, Shanghai, and Dubai. It is owned by Groupe Artémis, the holding company of François Pinault. In 2022 Christie's sold US$8.4 billion in art and luxury goods, an all-time high for any auction house. On 15 November 2017, the ''Salvator Mundi (Leonardo), Salvator Mundi'' was sold at Christie's in New York for $450 million to Saudi Prince Badr bin Abdullah Al Saud, List of most expensive paintings, the highest price ever paid for a painting. History Founding The official company literature states that founder James Christie (auctioneer), James Christie (1730–1803) conducted the first sale in London on 5 December 1766, and the earliest auction catalogue the company retains is from December 1766. However, other sources note that James Chri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swiss Franc
The Swiss franc, or simply the 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. It is also designated through currency signs ''Fr.'' (in German language), ''fr.'' (in French language, French, Italian language, Italian, Romansh languages), as well as in any other language, or internationally as ''CHF'' which stands for Franc. This acronym also serves as the ISO 4217 currency code, used by banks and financial institutions. The smaller denomination, a hundredth of a franc, is a (Rp.) in German, (c.) in French, (ct.) in Italian, and (rp.) in Romansh. The official symbols ''Fr.'' (German symbol) and ''fr.'' (Latin languages) are widely used by businesses and advertisers, also for the English language. According to ''Art. 1 SR/RS 941.101'' of the federal law ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Diamonds
Diamond (gemstone), Diamonds occur naturally and vary in size, color, and quality, so the largest of a particular color may not be large in absolute terms, but may still be considered very desirable. Diamonds may also have high valuations in sale prices, and large ones invariably have a noteworthy ownership history. There is no agreed-upon measure of a large or a high-quality diamond, and new ones displace others on any subjective list, so strict inclusion criteria for notable diamonds are not attainable. List of diamonds See also * List of largest rough diamonds * List of Golconda diamonds * List of emeralds by size * List of individual gemstones * List of gold nuggets by size * List of pearls by size * List of sapphires by size References {{DEFAULTSORT:List Of Diamonds Diamond-related lists, Individual diamonds, * Gemstone-related lists, Diamonds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oppenheimer Family
The Oppenheimer family is an Anglo–South African family best known for its longtime control of Anglo American and De Beers. Ernest Oppenheimer, a German immigrant to Britain and later to South Africa, founded the Anglo American Corporation in 1917 to mine the Witwatersrand for gold. He took control of De Beers in 1929 and became its chairman the same year, followed by his son Harry Oppenheimer in 1957 and his grandson Nicky Oppenheimer in 1998. In 2011, the family sold its remaining 40 per cent stake in De Beers to Anglo American for $5.1 billion in cash. By that time the family's equity in Anglo American had fallen below 2 per cent. The Oppenheimer family residence is the Brenthurst Estate in Parktown, Johannesburg. Family members * Bernard Oppenheimer (1866–1921) * Ernest Oppenheimer (1880–1957) ** Harry Oppenheimer (1908–2000) *** Mary Slack (born 1943) *** Nicky Oppenheimer (born 1945) ** Frank Leslie Oppenheimer (1910–1935) * Otto Oppenheimer (1882–19 ... [...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 impurities of boron within 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 most important criterion for grading a blue diamond and determining its value. However, the most valuable 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 mentioned blue diamonds i ... [...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. Diamond is tasteless, odourless, strong, brittle solid, colourless in pure form, a poor conductor of electricity, and insoluble in water. 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. 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) can color a diamond blue (boron), yellow (nitrogen), brown (defects), green (radiation exposure), purple, pink, oran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
