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Brilliant Cut
A brilliant is a diamond or other gemstone cut in a particular form with 57-58 facets so as to have exceptional brilliance. The word 'brilliant' is also used for a diamond cut in this fashion. The underside is conical, a shape that provides maximal light return through the top of the diamond. Even with modern techniques, the cutting and polishing of a diamond crystal always results in a dramatic loss of weight; rarely is this loss less than 50%. The round brilliant cut is preferred when the crystal is an octahedron, as often two stones may be cut from one such crystal. Oddly-shaped crystals such as macles are more likely to be cut in a '' fancy cut''—that is, a cut other than the round brilliant—which the particular crystal shape lends itself to. Origin and etymology The earliest diamond cutting techniques were simply to polish the natural shape of rough diamonds, often octahedral crystals. Around the 1500s, polishing and cutting inventions made it possible to shape diamond ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brillanten
''Diamonds'' () is a 1937 German mystery film directed by Eduard von Borsody and starring Hansi Knoteck, Viktor Staal, and Hilde Körber. The film's sets were designed by the art director Walter Röhrig. Location shooting took place in Amsterdam and Hamburg. Cast References Bibliography * External links * 1937 films 1937 mystery films Films of Nazi Germany German mystery films 1930s German-language films Films directed by Eduard von Borsody German black-and-white films UFA GmbH films Films set in Amsterdam Films shot in Amsterdam 1930s German films Films scored by Lothar Brühne {{1930s-Germany-film-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Promova
Promova (in English: /prɔˈmɔvʌ/) is a Computer-assisted language learning, language learning platform that includes a mobile app, website, personal and group lessons with tutors, and a conversation club. Starting in 2024, language courses include Artificial intelligence in education, AI learning tools for conversational practice and pronunciation recognition. History Promova was launched in 2019. Before that, the company was known as Ten Words, the app evolved into a comprehensive language-learning platform by 2022 and was rebranded as "Promova." In 2021, Andrew Skrypnyk, the company's CEO, was awarded Forbes 30 Under 30, 30 under 30 by Forbes Ukraine. In May 2023, Promova launched its Korean language course. The version was created by Elly Kim, a linguist with Korean roots living in Ukraine. On August 24, 2023, the Independence Day of Ukraine, Promova launched a Ukrainian language course, including 48 bite-sized lessons and flashcards with information about Ukrainian c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gemstone Cutting
A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or polished, is used to make jewelry or other adornments. Certain rocks (such as lapis lazuli, opal, and obsidian) and occasionally organic materials that are not minerals (such as amber, jet, and pearl) may also be used for jewelry and are therefore often considered to be gemstones as well. Most gemstones are hard, but some softer minerals such as brazilianite may be used in jewelry because of their color or luster or other physical properties that have aesthetic value. However, generally speaking, soft minerals are not typically used as gemstones by virtue of their brittleness and lack of durability. Found all over the world, the industry of coloured gemstones (i.e. anything other than diamonds) is currently estimated at US$1.55billion and is projected to steadily increase to a value of $4.46billion by 2033. A gem expert is a gemolog ... [...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] |
Princess Cut
The princess cut (technical name 'square modified brilliant') is a diamond cut shape often used in engagement rings. The name dates back to the 1960s, while the princess cut as it exists was created by Betazel Ambar, Ygal Perlman, and Israel Itzkowitz in 1980. The cut has a square or rectangular shape when viewed from above, and from the side is similar to that of an inverted pyramid with four beveled sides. Its popularity was at its highest in the 80s and 90s, though its popularity was high in the 2000s as well. It is the second most popular diamond cut, below round and above cushion. Characteristics The face-up shape of the princess cut (technical name 'square modified brilliant' is square or rectangular and the profile or side-on shape is similar to that of an inverted pyramid with four beveled sides. The design is sometimes considered feminine. When looked down on, it bears an X shape. They are slightly less expensive and less cut than round diamonds. The sharp points of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond Cutting
Diamond cutting is the practice of shaping a Diamond (gemstone), diamond from a rough stone into a faceted gem. Cutting diamonds requires specialized knowledge, tools, equipment, and techniques because of its extreme difficulty. The first guild of diamond cutters and polishers (Diamantaire) was formed in 1375 in Nuremberg, Germany, and led to the development of various types of "cut". This has two meanings in relation to diamonds. The first is the shape: square, oval, and so on. The second relates to the specific quality of cut within the shape, and the quality and price will vary greatly based on the cut quality. Since diamonds are one of the hardest materials, special diamond-coated surfaces are used to grind the diamond down. The first major development in diamond cutting came with the "Point Cut" during the later half of the 14th century: the Point Cut follows the natural shape of an octahedral rough diamond crystal, eliminating some waste in the cutting process. Diamond cut ... [...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 Displaying "arrows" - 509861FDFD
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] |
Hearts And Arrows
Hearts most commonly refers to: * Hearts (card game), a trick-taking game ** Black Lady, a common variant of Hearts * Hearts (suit), one of the standard four suits of cards * Heart, an organ Hearts may also refer to: Music * The Hearts, an American girl group closely related to the Jaynetts Albums * Hearts (America album), ''Hearts'' (America album) * Hearts (I Break Horses album), ''Hearts'' (I Break Horses album) * ''Hearts'', an album by Lenny (singer), Lenny Songs * Hearts (song), "Hearts" (song), a 1981 song by Marty Balin * "Hearts", a 1983 song by Yes from ''90125'' Sports * Auckland Hearts, a New Zealand women's cricket team * Buchanhaven Hearts F.C., a Scottish football club based in Aberdeenshire * Buncrana Hearts F.C., an association football club based in the Inishowen peninsula, County Donegal, Northern Ireland * Heart of Midlothian F.C., a Scottish football club based in Edinburgh * Kelty Hearts F.C., a Scottish football club based in Fife * Kennoway Star Hearts J. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solitary Ring And Diamond , a person who does not seek out, or actively avoids, interaction with others
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Solitary is the state of being alone or in solitude. The term may refer to: * ''Solitary'' (album), 2008 album by Don Dokken * ''Solitary'' (2020 film), a British sci-fi thriller film * ''Solitary'' (upcoming film), an American drama film * "Solitary" (''Lost''), a 2004 episode of the TV series ''Lost'' * ''Solitary'' (TV series), a reality show made by FOX * Solitary animal, an animal that does not live with others in its species * Solitary confinement, a form of imprisonment * Solitary Mountain, a mountain in Yukon, Canada * A hermit in many Christian religious orders See also * Solitaire (other) * Solitude (other) * Loner A loner is a person described as not seeking out, actively avoiding, or failing to maintain interpersonal relationships. There are many potential causes for this solitude. Intentional causes include introversion, mysticism, spirituality, reli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Culet
In gemology, a culet is a flat face on the bottom of a gemstone. During the 14th century, after the adoption of the table cut, a further facet was added to the bottom of the cut parallel to the surface of the table. The term used for these bottom facets derives from the Latin word for bottom, ''culus''. The culet is added largely to protect the integrity of the gemstone. On a diamond, the cleavage plane runs parallel to the octahedral faces, and so any damage to the tip of the diamond could cause a split up the entire length of the pavilion. With other gemstones that are not subject to cleavage, the culet is added to protect the fragility of the pointed tip. The culet has remained optional on many 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 ...s up to the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marcel Tolkowsky
Marcel Tolkowsky (25 December 1899 – 10 February 1991), Obituary. an engineer by education, was a Belgian member of a Jewish family of diamond cutters from Poland. He is generally acknowledged as the father of the modern round brilliant diamond cut. Many of his family have gone on to become noted diamond cutters, including his cousin Lazare Kaplan and his great-nephew Gabi Tolkowsky. Tolkowsky, as part of his PhD topic at the University of London, systematically studied the grinding of diamonds. Around the same time, in his book ''Diamond Design'', he published the specifications of what would later be called the ''American Standard'' (also known as the ''American Ideal Cut'', ''Tolkowsky cut'', and ''Tolkowsky Brilliant''), which is the diamond-cutting benchmark in North America. It was derived from mathematical calculations that considered both brilliance and fire of the stone. Marcel Tolkowsky found that if a diamond Diamond is a Allotropes of carbon, so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
